Good morning!
The correct answer is D- The carbon dioxide absorbed by the ocean increases.
Have a great day!
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If the temperature at the surface of the ocean increases, the amount of carbon dioxide dissolved in the seawater will generally decrease.
When the water temperature rises, it reduces the solubility of carbon dioxide, causing it to be released from the water into the atmosphere.
This happens because warm water has a lower capacity to hold dissolved gases compared to cold water. As a result, as the surface temperature of the ocean increases, the ability of the seawater to retain carbon dioxide decreases, leading to the release of carbon dioxide into the atmosphere.
So, in response to the question, the correct answer is: The carbon dioxide released into the atmosphere increases.
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Sulfur dioxide gas (SO2) reacts with excess oxygen gas (O2) and excess liquid water (H2O) to form liquid sulfuric acid (H2SO4). In the laboratory, a chemist carries out this reaction with 67.2 L of sulfur dioxide and gets 250 g of sulfuric acid.
• Calculate the theoretical yield of sulfuric acid.
• Calculate the percent yield of the reaction.
(One mole of any gas occupies 22.4 L under certain conditions of temperature and pressure. Assume those conditions for this question.)
1) Answer is: the percent yield of the reaction is 84.5%.
Balanced chemical reaction: 2SO₂ + 2H₂O + O₂ → 2H₂SO₄.
V(SO₂) = 67.2 L; voulume of sulfur dioxide.
Vm = 22.4 L/mol; molar volume.
m(H₂SO₄) = 250 g; actual mass of sulfuric acid.
n(SO₂) = V(SO₂) ÷ Vm.
n(SO₂) = 67.2 L ÷ 22.4 L/mol.
n(SO₂) = 3 mol; amount of sulfur dioxide.
2) From balanced chemical reaction: n(SO₂) : n(H₂SO₄) = 2 : 2 (1 : 1).
n(H₂SO₄) = n(SO₂).
n(H₂SO₄) = 3 mol; amoun of sulfuric acid.
M(H₂SO₄) = 98.08 g/mol; molar mass of sulfuric acid.
m(H₂SO₄) = n(H₂SO₄) · M(H₂SO₄).
m(H₂SO₄) = 3 mol · 98.08 g/mol.
m(H₂SO₄) = 294.24 g; theoretical mass of sulfuric acid.
Theoretical yield is the maximum amount of product that can be produced from limiting reactant and actual yield is a product that is obtained by experimentation.
the percent yield = actual yield / theoretical yield.
the percent yield = 250 g ÷ 294.24 g · 100%.
the percent yield = 84.5 %.
A half-life is the time it takes an amount of substance to decay to one-half of its original amount. For example, the sample is one-half after the first half-life but one-quarter (i.e., one-half of one-half) after the second half-life. If the half life of uranium-235 is 700 million years, how long does it take for 10.0 grams to decay to 2.5 grams? Express your answer in billions of years.
Answer:
2.10 × 10⁹ yr
Step-by-step explanation:
The half-life of U-235 is the time it takes for half the U to decay.
After one half-life, half (50 %) of the original amount will remain.
After a second half-life, half of that amount (25 %) will remain, and so on.
We can construct a table as follows:
No. of Fraction Amount
half-lives t/(yr × 10⁶) remaining remaining/g
1 700 ½ 10.0
2 1400 ¼ 5.00
3 2100 ⅛ 2.50
4 2800 ¹/₁₆ 1.25
We see that 2100 × 10⁶ yr is three half-lives, and the amount of U-235 remaining is 2.50 g.
It takes 2.10× 10⁹ yr for the U-238 to decay to 2.50 g.
Chemical precipitation occurs when a product is BLANK and precipitates out of a solution. By comparison, precipitation reactions require the reactants to be BLANK in the solvent. 1.) A- insoluble B- oxidized C- reduced D- soluble 2.) A- insoluble B- oxidized C- reduced D- soluble
Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids. Because not all aqueous reactions form precipitates, one must consult the solubility rules before determining the state of the products and writing a net ionic equation. The ability to predict these reactions allows scientists to determine which ions are present in a solution, and allows industries to form chemicals by extracting components from these reactions.
Answer: 1. Option (A) is the correct answer.
2. Option (D) is the correct answer.
Explanation:
When there is formation of an insoluble salt due to chemical reaction where two ions combine together in an aqueous solution then this insoluble salt is known as precipitate.
Therefore, chemical precipitation occurs when a product is insoluble and precipitates out of a solution.
Whereas reactants dissolve in precipitation reaction that is why a chemical reaction takes place in which an insoluble product is formed.
For example, [tex]AgNO_{3}(aq) + NaCl(aq) \rightarrow AgCl (ppt) + NaNO_{3}(aq)[/tex]
Here AgCl is the precipitate which is insoluble.
Thus, we can conclude the following.
Chemical precipitation occurs when a product is insoluble and precipitates out of a solution.By comparison, precipitation reactions require the reactants to be soluble in the solvent.A small 23 kilogram canoe is floating downriver at a speed of 3 m/s. What is the canoe's kinetic energy?
Kinetic energy is defined as the energy the object possess due to its motion. It is the work that accelerates a given body from rest to motion.
Given:
The mass of the canoe is 23 kilogram
The velocity of the canoe is 3 m/s
The kinetic energy can be given by the formula:
KE = [tex]\frac{1}{2}.m.v^{2}[/tex]
Substituting the given values in the kinetic energy equation
KE =[tex]\frac{1}{2}.(23kg).(3m/s)^{2}[/tex]
KE= 11.5 * 9 kg.m^2/s^2
k = 103.5 J
Therefore the kinetic energy of the canoe is 103.5 Joules.
10.0 g of gaseous ammonia and 6.50 g of oxygen gas are introduced into a previously evacuated 5.50 L vessel. If the ammonia and oxygen then react to yield NO gas and water vapor, what is the final gas pressure inside the vessel at 23?C
3.54 × 10⁵ Pa.
ExplanationAmmonia NH₃ and oxygen gas O₂ reacts at a one-to-one molar ratio to produce NO and H₂O.
NH₃ + O₂ → NO + H₂O (Balanced)
NH₃ has a molar mass of 17.03 g/mol. 10.0 g of NH₃ contains 0.5872 mol molecules.O₂ has a molar mass of 32.00 g/mol. 6.50 g of H₂O contains 0.2031 mol molecules.H₂O is the limiting reactant. All 0.2031 mol of O₂ will be consumed. Only 0.2031 mol of NH₃ will be consumed. 0.5872 - 0.2031 = 0.3841 mol of NH₃ will be in excess. The reaction will produce 0.2031 mol of NO and 0.2031 mol of H₂O.The vessel will contain
0.3841 mol NH₃,0 mol O₂,0.2031 mol NO, and0.2031 mol H₂O.It will contain 0.3841 + 0.2031 + 0.2031 = 0.7903 mol gas particles by the end of the reaction.
[tex]P = n \cdot R \cdot T / V \\\phantom{P} = 0.7903 \times (8.314 \times 10^{3}) \times (273 + 23) / 5.50 \\\phantom{P} = 3.54 \times 10^5 \; \text{Pa}[/tex]
Assuming that the final mixture is an ideal gas, it will exert a pressure of 3.54 × 10⁵ Pa on the container.
We can find the final gas pressure by first converting the given grams of ammonia and oxygen into moles, then using the ideal gas law to calculate the final gas pressure. The final gas pressure inside the vessel after the reaction is approximately 2.54 atm.
Explanation:In this question, we are asked to find the final gas pressure inside the vessel after a reaction between gaseous ammonia (NH3) and oxygen (O2), yielding Nitric Oxide (NO) gas and water vapor. The reaction is as follows: 4NH3(g) + 5O2(g) => 4NO(g) + 6H2O(g).
First, we need to calculate the number of moles for both ammonia and oxygen. We know that the molar mass of NH3 is 17 g/mol, and for O2 its 32 g/mol. Therefore, we have 10.0g / 17 g/mol = 0.59 mol ammonia and 6.50g / 32 g/mol = 0.20 mol oxygen.
Now apply the ideal gas law (PV=nRT), we will find the final pressure. Note that to use this formula, the temperature needs to be in Kelvin. We convert 23C to 296.15K(23 + 273.15). The total number of moles of gas is the sum of the moles of ammonia and oxygen, and the total volume is given as 5.50L.
So, the total pressure = nRT/V = (0.59 mol + 0.20 mol) * 0.0821 L atm/mol K × 296.15K / 5.50 L. This yields a final pressure of approximately 2.54 atm.
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What is not true about most combustion reactions? a) elemental carbon is a product b) energy is released c) a carbon-based fuel is a reactant d) molecular oxygen is a reactant
It would be A bc carbon is NOT usually a product. You can find out more about the by searching combustion reactions, then u should be able to answer the questions on your own.
Answer: The correct answer is Option a.
Explanation:
Combustion reaction is defined as the reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide gas and water molecule. It is considered as an exothermic reaction as energy is released during these reactions.
A hydrocarbon is a substance which contains a covalent bond between a hydrogen and carbon atoms. So, it is considered as a carbon-fuel compound.
The general equation for this reaction follows:
[tex]\text{hydrocarbon}+O_2(g)\rightarrow CO_2(g)+H_2O(g)+\text{heat}[/tex]
From the above equation, it is visible that elemental carbon is not produced.
Hence, the correct answer is Option a.
When two or more substances combine, but each keeps it own properties,the new combination is called a (an)
The new combination is called a mixture.
In mixtures, since the substances are not chemically combined together, they still remain their own physical and chemical properties, and can be separated by simple physical methods such as filtration or distillation.
On the other hand, if the two or more substances are combined where they get new properties, the new combination will be called a compound. They cannot be separated by physical methods, but chemical methods such as heating or electrolysis.
a. What is the mass number of an alpha particle?
b. What is the identity of an alpha particle?
c. What kind of charge does an alpha particle have?
a) Answer is: mass number of an alpha particle is is 4.
Muss number is sum of protons and neutrons.
b) Answer is: alpha particle is nucleus of a helium-4 atom, which is made of two protons and two neutrons.
For example, nuclear reaction: ²³⁸U → ²³⁴Th + α (alpha particle).
Alpha decay is radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and transforms into an atom with an atomic number that is reduced by two and mass number that is reduced by four.
c) Answer is: alpha particle has positive charge +2, because it has two protons.
Protons (positive particles) and neutrons (neutral particles) are in the nucleus of an atom.
Final answer:
An alpha particle has a mass number of 4 and is identical to a helium-4 nucleus with a double positive charge. In a magnetic field, the motion of an alpha particle is influenced by its charge, curving the particle's trajectory perpendicularly to its velocity vector and the field direction.
Explanation:
Characteristics of an Alpha Particle
An alpha particle has a mass number of 4. This particle is equivalent to the nucleus of a helium-4 atom, consisting of two protons and two neutrons. Because of this composition, an alpha particle carries a double positive charge (+2).
The Identity of an Alpha Particle
The identity of an alpha particle is the same as a helium nucleus. When it comes to nuclear equations involving alpha decay, ejection of an alpha particle from a parent nucleus results in the formation of a new element with an atomic number reduced by two and a mass number reduced by four.
Behavior in a Magnetic Field
In a magnetic field, the charge of the alpha particle affects its path, causing it to curve due to the Lorentz force. If an alpha particle is moving in the x-direction and the field is in the z-direction, the magnetic force will act in the y-direction, according to the right-hand rule.
You are given the balanced equation:
Zn(NO3)2 (aq) + Na2S (aq) ----> ZnS (s) + X
What is correct formula for the product represented by X?
A. Na2(NO3)2 (s)
B. Na2NO3 (s)
C. NaNO3 (aq)
D. 2 NaNO3 (aq)
Answer:
D. 2 NaNO₃
Explanation:
A double displacement reaction is a type of reaction where two reactants exchange ions to form two new compounds. Double displacement reactions typically result in the formation of a product that is a precipitate.
Double displacement reactions take the form:
AB + CD → AD + CB
For the reaction:
Zn(NO₃)₂(aq) + Na₂S(aq) → ZnS(s) + X
If Zn bond with S, NO₃ must be react with Na to produce NaNO₃ that is a soluble salt (Is in aqueous state (aq)). As there are 2 Na and 2 NO₃ the right answer is:
D. 2 NaNO₃
I hope it helps!
How many atoms are in 35.5 g of chlorine?
A. 3 × 10^23 atoms
B. 6.02 × 10^23 atoms
C. 1.2 × 10^24 atoms
D. 3 × 10^24 atoms
(Not D)
Answer: Option (B) is the correct answer.
Explanation:
According to Avogadro's number, one mole of a substance contains [tex]6.022 \times 10^{23}[/tex] atoms or molecules.
As molar mass of chlorine is 35.5 g/mol. Hence, calculate its number of moles as follows.
No. of moles = [tex]\frac{mass}{\text{molar mass}}[/tex]
= [tex]\frac{35.5 g}{35.5 g/mol}[/tex]
= 1 mol
Therefore, number of atoms present in 1.01 mol are calculated as follows.
[tex]1 mol \times 6.022 \times 10^{23}[/tex] atoms/mol
= [tex]6.02 \times 10^{23}[/tex] atoms
Therefore, we can conclude that there are [tex]6.02 \times 10^{23}[/tex] atoms in 35.5 g of chlorine.
The number of atoms in 35.5 g of chlorine is 6.02 × 10²³ atoms.
The correct answer is B. 6.02 × 10²³ atoms.
To calculate the number of atoms in a given mass of chlorine, we need to use Avogadro's number, which is approximately 6.02 × 10²³ atoms/mol.
The molar mass of chlorine (Cl) is approximately 35.5 g/mol.
Now, we can proceed with the calculation:
Number of moles of chlorine = Given mass / Molar mass
Number of moles of chlorine = 35.5 g / 35.5 g/mol = 1 mol
Number of atoms in 1 mol of chlorine = Avogadro's number = 6.02 × 10²³ atoms/mol
So, the number of atoms in 35.5 g of chlorine is 6.02 × 10²³ atoms.
The correct answer is B. 6.02 × 10²³ atoms.
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How many moles of carbon are in a sample of 21.45 moles of heptane(C7H16)???????
The moles of carbon that are in the sample of 21.45 moles of heptane(C₇H₁₆) is 150.15 moles
calculation
moles of carbon = moles of heptane × number of C atom
number of C atom in heptane = 1 ×7 = 7 atoms
moles is therefore = 21.45 moles × 7 =150.15 moles
Answer: The number of moles of carbon atom that the given amount of heptane is 150.15 moles
Explanation:
We are given:
Moles of heptane = 21.45 moles
The chemical formula for heptane is [tex]C_7H_{16}[/tex]
1 mole of heptane contains 7 moles of carbon atom and 16 moles of hydrogen atom
So, 21.45 moles of heptane will contain [tex](7\times 21.45)=150.15moles[/tex] of carbon atom
Hence, the number of moles of carbon atom that the given amount of heptane is 150.15 moles
In the covalent bond formation process orbitals from each atom overlap and electrons are shared between each atom. You can visualize the 1s atomic orbital of one hydrogen atom overlapping with the 1s orbital of the other hydrogen atom to form an HâH covalent bond. Each hydrogen atom in the H2 molecule has the electron configuration analogous to that of the He atom. Similarly, when 2p orbitals of two fluorine atoms overlap they share one electron each. The total number of electrons in each F atom is nine. Each F atom shares one electron with the other F atom, and thus the total number of electrons in each F atom in the F2 molecule is 10. Therefore, each F atom in the F2 molecule has the electron configuration analogous to that of Ne.
The atomic orbitals of two iodine atoms combine to form the diatomic I2 molecule. Use the periodic table to determine the atomic orbitals that overlap to form the I2 molecule and the symbol of the noble gas that has the same electron configuration as the electron configuration of each bonded iodine atom.
For example, the 2p atomic orbitals of fluorine atoms overlap to form the F2 molecule. The noble gas that has the same electron configuration as that of each bonded fluorine atom is Ne. To enter the atomic orbitals that overlap and the corresponding noble gas, you would enter 2p,Ne.
Enter the symbol for the orbitals that overlap and the chemical symbol of the noble gas separated by a comma. For example, for H2 enter 1s, He.
In an I2 molecule, the 5p atomic orbitals of iodine atoms overlap to form the covalent bond. The I2 molecule has an electron configuration analogous to Xenon.
Explanation:In the diatomic I2 molecule, the 5p atomic orbitals of each iodine atom overlap to form the covalent bond. As per the electron configuration, an iodine atom has 7 electrons in its outermost 5p orbital. When these combine with another iodine atom, they share 1 electron each, for a total of 8 electrons. This corresponds to the electron configuration of the noble gas Xe (Xenon). Therefore, each iodine atom in an I2 molecule has an electron configuration analogous to Xenon.
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In I2 molecule formation, the 5p orbitals overlap. Each Iodine atom ends up with a total of 54 electrons. This configuration is analogous to the noble gas Xenon (Xe).
Explanation:In the formation of I2 molecule, the 5p atomic orbitals overlap, similar to the 2p orbitals that overlap in the formation of F2 molecule. When the atomic orbitals of the two iodine atoms overlap and combine, each iodine atom shares one electron with the other, which gives each iodine atom in the I2 molecule a total of 54 electrons. When we look at the periodic table, we can see that the noble gas Xenon (Xe) has 54 electrons. Therefore, each iodine atom in the I2 molecule has an electron configuration analogous to that of xenon (Xe).
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Can someone please help me please?
13. The boiling point of a solvent is elevated by 2.4 °C when the solute concentration is 3.1 m. What is Kb?
What is the freezing-point depression of a solution that contains 0.705 mol of a nonelectrolyte solute in 5.02 kg of water? (Kf = 1.86 °C/m)
Answers:
0.77 °C·kg·mol⁻¹; 0.261 °C
Step-by-step explanation:
13. a. Boiling point elevation
The formula for boiling point elevation ΔTb is
ΔTb = Kb·b Divide each side by b
Kb = ΔTb/b
Kb = 2.4/3.1
Kb = 0.77 °C·kg·mol⁻¹
===============
13. b. Freezing point depression
The formula for freezing point depression [tex]\Delta T_{f}[/tex] is
[tex]\Delta T_{f} = \Delta K_{f} \cdot b[/tex]
b = moles of solute/kilograms of solvent
b = 0.705/5.02
b = 0.1404 mol/kg
[tex]\Delta T_{f} = 1.86 \times 0.1404[/tex]
[tex]\Delta T_{f} = 0.261 \textdegree \text{C}[/tex]
Answer:
1) The value of the [tex]K_b[/tex] is 0.07742°C/m.
2) 0.261°C is the freezing-point depression of a solution.
Explanation:
1) [tex]\Delta T_b=T_b-T[/tex]
[tex]\Delta T_b=K_b\times m[/tex]
[tex]\Delta T_b=iK_b\times \frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent in Kg}}[/tex]
where,
[tex]\Delta T_b[/tex] =Elevation in boiling point
[tex]K_b[/tex] = boiling point constant of solvent= 3.63 °C/m
1 - van't Hoff factor (non-electrolyte solute)
m = molality
We have : [tex]\Delta T_b=2.4^oC[/tex]
m = 3.1 m
[tex]K_b=?[/tex]
[tex]\Delta T_b=K_b\times m[/tex]
[tex]2.4^oC=K_b\times 3.1 m[/tex]
[tex]K_b=\frac{2.4 ^oC}{3.1 m}=0.07742 ^oC/m[/tex]
The value of the [tex]K_b[/tex] is 0.07742°C/m.
2) [tex]\Delta T_f=T-T_f[/tex]
[tex]\Delta T_f=K_f\times m[/tex]
[tex]Delta T_f=iK_f\times \frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent in Kg}}[/tex]
where,
[tex]\Delta T_f[/tex] =depression in freezing point
[tex]K_f[/tex] = freezing point constant of solvent= 1.86°C/m
1 - van't Hoff factor (non-electrolyte solute)
m = molality
We have , Moles of solute = 0.705 mol
Mass of solvent = 5.02 kg
[tex]molality=\frac{\text{Moles of solute }}{\text{Mas of solvent(kg)}}[/tex]
m = [tex]\frac{0.705 mol}{5.02 kg}=0.1404 mol/kg[/tex]
[tex]K_f=1.86^oC/m[/tex]
[tex]\Delta T_f=iK_f\times m[/tex]
[tex]=1\times 1.86 ^oC/m\times 0.1404 m[/tex]
[tex]=0.261^oC[/tex]
0.261°C is the freezing-point depression of a solution.
Which of the following quantites would have the greatest mass: one mole of carbon atoms, one mole of helium atoms, one mole of neon atoms?
A) one mole of helium atoms
B) one mole of carbon atoms
C) They would have equal masses.
D) one mole of neon atoms
Atomic mass of carbon is 12 so 1 mole = 12 grams.
For helium it is 4.003 grams
For neon it is 20.18 grams
So one mole of neon has the greatest mass.
The mass of 1 mole of neon is greater than 1 mole of carbon or helium. Option D is correct.
What is the Mole concept?The mole is a constant that is used as a unit to measure the small particles such as the atom, ion, and molecules.1 mole is equal to the Avogadro's constant [tex]6.02 \times 10^2^3[/tex]
[tex]n = \dfrac wm[/tex]
Where,
[tex]n[/tex] - number of moles
[tex]w[/tex] - weight (given mass)
[tex]m[/tex] - molar mass
For Carbon,
[tex]1 {\rm \ mole} = \dfrac w {12}\\\\w = 12[/tex]
So, the 1 mole of Carbon has 12 g of mass.
1 mole of Helium has about 4 g of mass.
1 mole of neon has about 20 g of mass.
Therefore, the mass of 1 mole of neon is greater than 1 mole of carbon or helium.
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Quick question.
In which group of the periodic table do you find halogens?
A.2A
B.8A
C.1A
D.7A
Solution:- Halogens are fluorine, chlorine, bromine, iodine and Astatine(F, Cl, Br, I and At) and these are present in the 7A group of the periodic table. In modern periodic table this group is written as 17th group. This group elements have 7 valence electrons and so they are in group 7A.
So, the right choice is D. 7A.
What is the molarity of solution obtained when 5.71 g of sodium carbonate-10-water is dissolved in water and made up to 250.0 cm^3 solution? (Relative atomic masses: H = 1.0, C = 12.0, O = 16.0, Na = 23.0)
A. 0.08 mol dm^-3
B. 0.11 mol dm^-3
C. 0.16 mol dm^-3
D. 0.22 mol dm^-3
We have to know the molarity of solution obtained when 5.71 g of Na₂CO₃.10 H₂O is dissolved in water and made up to 250 cm³ solution.
The molarity of solution obtained when 5.71 g of sodium carbonate-10-water (Na₂CO₃.10 H₂O) is dissolved in water and made up to 250.0 cm^3 solutionis: (A) 0.08 mol dm⁻³
The molarit y of solution means the number of moles of solute present in one litre of solution. Here solute is Na₂CO₃.10 H₂O and solvent is water. Volume of solution is 250 cm³.
Molar mass of Na₂CO₃.10 H₂O is 286 grams which means mass of one mole of Na₂CO₃.10 H₂O is 286 grams.
5.71 grams of Na₂CO₃.10 H₂O is equal to [tex]\frac{5.71}{286}[/tex]= 0.0199 moles of Na₂CO₃.10 H₂O. So, 0.0199 moles of Na₂CO₃.10 H₂O present in 250 cm³ volume of solution.
Hence, number of moles of Na₂CO₃.10 H₂O present in one litre (equal to 1000 cm³) of solution is [tex]\frac{0.0199 X 1000}{250}[/tex] = 0.0796 moles. So, the molarity of the solution is 0.0796 mol/dm³ ≅ 0.08 mol/dm³
The solution in the two arms of the U-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. Side A is half filled with a solution of 2 M sucrose and 1 M glucose. Side B is half filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on both sides are equal. After the system reaches equilibrium. what changes are observed?
Answer:
The liquid level will rise in Side A and drop in Side B.
Step-by-step explanation:
The membrane is impermeable to sucrose, but permeable to sucrose and water.
Side A Side B
2 M sucrose 1 M sucrose
1 M glucose 2 M glucose
(a) Ignoring osmotic effects
The glucose will diffuse spontaneously from the side with higher concentration to that of lower concentration until equilibrium is established. There is no change in volume on either side.
At this point, we have
Side A Side B
2 M sucrose 1 M sucrose
1.5 M glucose 1.5 M glucose
=====
(b) With osmotic effects
The solute concentration on Side A is greater than on Side B.
Water will diffuse into Side A.
The liquid level will rise in Side A and drop in Side B.
At equilibrium, glucose will be evenly distributed on both sides of the membrane, the level of liquid on Side A will have risen, and the level on Side B will have fallen due to the osmotic pressure induced by the unequal concentration of sucrose and initial glucose concentrations.
Explanation:The question relates to the biology concept of osmosis and diffusion through a semipermeable membrane. Initially, the concentration of sucrose is higher on Side A than Side B, and the membrane is impermeable to sucrose. As a result, sucrose remains where it is, creating an osmotic pressure.
However, with respect to glucose, which is permeable, Side A has a lower concentration than Side B. This difference in glucose concentration causes glucose to move from Side B to Side A, following the concentration gradient until glucose levels on both sides reach an equilibrium.
The membrane is also permeable to water. Due to sucrose-induced osmotic pressure on Side A and the initial glucose concentration on Side B, water will shift towards Side A till an equilibrium is reached. Water moves from a high concentration to a low concentration in order to balance the solution.
So, in conclusion, at equilibrium, the level of liquid on Side A would have risen and the level on Side B would have fallen. Also, glucose would be evenly distributed on both sides of the membrane.
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Chuck has a very detailed model of the solar system where each planet is made out of granite rock. Since his little sister really liked the model, he spent two weeks in his dad's workshop building her a Styrofoam copy. When he picked up the models to take them back inside the house, which physical property would he immediately notice upon picking them up?
He could be blindfolded and know which was his and which was his sister's. All he would need to do is pick them both up and if they were too big then pick them up one at a time. The lumber might make it harder to tell, but this is a question about physical properties.
So there is a change in mass which for the purpose of this question should be quite different. His sister's ought to be much lighter than his. He would find it easier to pick up.
the answer is desity
Question 1 (True/False Worth 2 points) (04.03 LC) When Pb and AlCl3 react together, lead (Pb) can replace aluminum (Al) in the compound because lead is lower on the activity series. True False Question 2(Multiple Choice Worth 4 points) (04.03 MC) Which of the following equations has the correct products and is balanced correctly for a reaction between Na3PO4 and KOH? Na3PO4 + 3KOH → 3NaOH + K3PO4, because K retains the same charge throughout the reaction Na3PO4 + KOH → Na3OH + KPO4, because K increases in charge from 1+ to 3+ when it is replaced Na3PO4 + KOH → 3NaOH + K3PO4, because K retains the same charge throughout the reaction Na3PO4 + KOH → Na3OH + K3PO4, because K increases in charge from 1+ to 3+ when it is replaced Question 3(Multiple Choice Worth 4 points) (04.03 LC) Which of the following is a single replacement reaction? Ba(OH)2 + H2SO4 → BaSO4 + 2H2O 2Mg + O2 → 2MgO H2O+ CO2 → H2CO3 Zn + H2SO4 → ZnSO4 + H2 Question 4(Multiple Choice Worth 4 points) (04.03 MC) Sodium metal reacts with water to produce hydrogen gas. What best describes this reaction? A single replacement reaction takes place because sodium is less reactive than hydroxide ions. A double replacement reaction takes place because sodium is less reactive than hydroxide ions. A double replacement reaction takes place because sodium is more reactive than hydrogen. A single replacement reaction takes place because sodium is more reactive than hydrogen. Question 5 (True/False Worth 2 points) (04.03 LC) A single replacement reaction is a reaction in which one element replaces a similar element within a compound. True False Question 6(Multiple Choice Worth 4 points) (04.03 MC) The table shows the nature of reactants and products formed in a certain type of chemical reaction. Nature of Reactants and Products Reactants Products Metal + Ionic compound Metal + Ionic compound Which of the following is true about the type of chemical reaction? It is a single replacement reaction, and the anions in the two ionic compounds are different. It is a single replacement reaction, and the cations in the two ionic compounds are different. It is a double replacement reaction, and the anions in the two ionic compounds are different. It is a double replacement reaction, and the cations in the two ionic compounds are different.
Answer 1) [tex]Pb+AlCl_3\rightarrow [/tex] no reaction
As lead lies lower in reactivity series, it is less reactive than Aluminium. It will not be able to displace aluminium from its salt and hence no reaction occur. Thus the given statement is false.
2) [tex]Na_3PO4+3KOH\rightarrow 3NaOH+K_3PO_4[/tex], because K retains the same charge throughout the reaction.
A balanced chemical reaction is one in which the number of atoms on both sides of a chemical equation are same. Also K has an oxidation state or charge of +1 in [tex]KOH[/tex] as well as [tex]K_3PO_4[/tex]
3) [tex]Zn+H_2SO_4\rightarrow ZnSO_4+H_2[/tex]
A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus zinc can easily lose electrons as compared to hydrogen and result in the formation of zinc sulfate and hydrogen.
[tex]Ba(OH)_2+H_2SO_4\rightarrow BaSO_4+2H_2O[/tex]: is a double displacement reaction in which ion exchange takes place.
[tex]2Mg+O_2\rightarrow 2MgO[/tex]: It is a synthesis reaction as two reactants combine to give a single product.
[tex]H_2O+CO_2\rightarrow H_2CO_3[/tex]: It is a synthesis reaction as two reactants combine to give a single product.
4) [tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex] Sodium metal reacts with water to produce hydrogen gas: A single replacement reaction takes place because sodium is more reactive than hydrogen.
Sodium easily lose electrons than hydrogen and get oxidized to [tex]Na^+[/tex] in NaOH and [tex]H^+[/tex] get reduced to give [tex]H_2[/tex]
5) A single replacement reaction is a reaction in which one element replaces a similar element within a compound - False
A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.
A double displacement reaction is one in which exchange of ions take place.
6) Metal + Ionic compound : It is a single replacement reaction, and the cations in the two ionic compounds are different.
Example: [tex]2K+MgCl_2\rightarrow 2KCl+Mg[/tex] where K is a metal and [tex]MgCl_2[/tex] is an ionic compound. K being more reactive than Mg, displaces it from its salt solution.
Final answer:
The correct answers are False for Question 1 as Pb cannot replace Al in AlCl₃, the balanced equation for Na₃PO₄ and KOH is Na₃PO₄+ 3KOH → 3NaOH + K₃PO₄, and Zn + H₂SO₄ → ZnSO₄ + H₂ is an example of a single replacement reaction. True for Question 5, the nature of the single replacement reaction involves different cations.
Explanation:
For question 1, the statement is False. Lead (Pb) cannot replace aluminum (Al) in AlCl₃ because, according to the activity series, lead is less reactive than aluminum. For Pb to replace Al, Pb must be higher on the activity series.
For question 2, the correct balanced equation is Na₃PO₄ + 3KOH → 3NaOH + K₃PO₄, as potassium (K) retains the 1+ charge throughout the reaction.
For question 3, Zn + H₂SO₄ → ZnSO₄ + H₂ is an example of a single replacement reaction, where zinc (Zn) replaces the hydrogen (H).
For question 4, the reaction is a single replacement reaction that takes place because sodium (Na) is more reactive than hydrogen (H).
For question 5, the statement is True. A single replacement reaction involves one element replacing a similar element within a compound.
For question 6, the correct answer is It is a single replacement reaction, and the cations in the two ionic compounds are different.
Covalent bonds usually occur between atoms that have and . A. High molecular weights; large atomic radii B. Low ionization energies; low electron affinities C. Low molecular weights; small atomic radii D. High ionization energies; high electron affinities
Answer is: D. High ionization energies; high electron affinities.
Covalent bond is usually between nonmetals.
The ionization energy (Ei) is the minimum amount of energy required to remove the valence electron, when element lose electrons, oxidation number of element grows (oxidation process).
Nonmetals are far right in the main group and they have highest ionization energy, because they have many valence electrons.
For example, fluorine has the greatest affinity for electrons and tendency to be reduced, than oxygen and chlorine.
Fluorine form molecule of fluorine F₂ with single nonpolar covalent bond.
Complete the sentence. When an acid is added to water, hydroxide ions __________.
increase
decrease
stay the same
disappear
(MY WHOLE GRADE DEPENDS ON THIS QUESTION)
The largest number from among the following is:
1.80 x 10-6
1.80 x 10-4
1.80 x 10-8
1.80 x 10-2
The largest number of the four options is 1.8 X 10-2
You have it in scientific notation.
1.80 X 10-6 = 0.00000180
1.80 X 10-4 = 0.000180 (bigger, or "less small", than the former one)
So
1.8 X 10-2 = 0.0180. As you see. The "less small", or the biggest one of them all.
As you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).
If you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:
1.8 X (10)2 = 180
So. If you have negative exponent in Scientific notation, move the dot toward left. If it is positive, toward right as many times the exponent tells you.
Answer:
1.80 x 10-2
Explanation:
Which ocean basin has spread the greatest distancen during the last 2 million years
Atlantic
Hope I helped thanksss
Answer:
Atlantic has spread during this time
Explanation:
because South America , North America, and Australia separated from antarctica
how can we relate the presence if color in an ionic solution as a characteristic lf electron configuration
Which statement is true about HCl? (5 points) Select one: a. It is a salt because it increases the concentration of metallic ions. B. It is a salt because it is formed by the reaction of an acid and a base. C. It is an acid because it increases the concentration of hydroxyl ions. D. It is an acid because it increases the concentration of hydronium ions.
ANSWER
It is an acid because it increases the concentration of hydronium ions.
HCl is an acid. When HCl is added into water, it undergoes the following dissociation:
HCl + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq).
The Arrhenius definition defines acids as subtances that release H⁺(aq) when put in water. This H⁺(aq) ions that HCl releases reacts with water to form H₃O (hydronium), leading to an increase in concentration of H₃O.
The statement which is true about HCl is that it is an acid because it increases the concentration of hydronium ions. Thus, the correct option for this question is D.
What is HCl?HCl stands for hydrochloric acid. It is an inorganic chemical that has a strong corrosive acid with a chemical formula HCl. It is also known as hydrogen chloride or muriatic acid. When hydrogen chloride is dissolved in water HCl is formed.
HCl is a strong acid. When HCl is added to water, it significantly undergoes the dissociation reaction that is as follows:
HCl + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq).According to Arrhenius's definition, it defines that acid is a substance that liberates H⁺(aq) when put in water. These H⁺(aq) ions that HCl releases typically react with water in order to form H₃O (hydronium), which leads to an enhancement in the concentration of H₃O.
Therefore, the statement which is true about HCl is that it is an acid because it increases the concentration of hydronium ions. Thus, the correct option for this question is D.
To learn more about Hydrochloric acid, refer to the link:
https://brainly.com/question/24586675
#SPJ5
Which is true about each element in a period or horizontal row of the periodic table?
A.
Each element has one more outer shell than the element before it.
B.
Each element has one more outer electron than the element before it.
C.
Each element has one more isotope than the element before it.
D.
Each element bonds with the element before it.
The true about element in period or horizontal row of periodic table is
Each element has one more outer electron than the element before it. (answer B)
Explanation
In periodic table there are four horizontal rows(periods) that is period 1,2,3 and 4.
Across the period each element has one more electron than element before it.
For example Na and Mg which are in periodic 3.
Na has 2.8.1 or [Ne] 3s¹ electron configuration while Mg has 2.8.2 or [Ne] 3S² electron configuration.
Since Mg has 2 outer electrons while Na has 1 outer electron, Mg has more electron than Na.
NEED SOME HELP
Which of the following particulates may be found in a sample of air?
A. Dust
B. Pollen
C. Volcanic Ash
D all of the above
Your answer to this question would be D. all of the above. Hope that my answer can help you and good luck!
Evaluate the scenario.
An electron in the energy level closest to the nucleus absorbs a photon.
Which of the answer choices best describes what will happen next?
The electron will move from a higher energy level to a lower energy level.
The electron will move from the first energy level to the third energy level.
The electron will move from a lower energy level to a higher energy level.
The electron will move from the first energy level to the second energy level.
The electron will move from the first energy level to the second energy level.
The energy level closest to the nucleus is the first energy level, and when an electron absorbs a photon, it absorbs the energy in the photon. This absorption causes the electron to move from the first to second energy level.
a. What is the mass number of the particle emitted from the nucleus
during beta minus (β–) decay?
b. What kind of charge does the particle emitted from the nucleus during
beta minus (β–) decay have?
c. What is another name for a beta minus (β–) particle?
Answer: For a. Mass number for the particle is 0.
For b. The charge on the particle is -1.
For c. Another name for [tex]\beta [/tex]- particle is electron.
Explanation:
Beta- minus decay is the decay process in which beta-particle is emitted. The mass number of the nuclei remains same and the mass number of the particle is 0. The charge on the particle is -1 and the emitted particle is also called as electron.
[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta[/tex]
For a. The mass number for the particle is 0.
For b. The charge on the particle is -1.
For c. Another name for [tex]\beta [/tex]- particle is electron.
How does the number of Carbon atoms per molecule affect the state at room temperature? Explain how this is similar or different from Viscosity.
Explanation:
There are three states of matter:
1) Solid: In this state, the particles lie closer to each other. there is a strong intermolecular force of attraction between the particles.
2) Liquid: In this state, the particles are at a certain distance to each other. There is an intermediate intermolecular force of attraction between the particles.
3) Gas: In this state, the particles are farther from each other. There is weaker intermolecular force of attraction between the particles.
As the number of carbon atoms in a molecule increases, the number of particles increases and the particles will come closer to each other. Hence, the state of matter will shift towards the solid state.
Viscosity is defined as the tendency to resist the particles to flow. As, the number of carbon atoms increases, the Vander-Walls forces increases, the particles are closer to each other and Hence, the viscosity will increase.