Answer:
89.0 g.
Explanation:
The balanced chemical equation between CuO and HCl is:2Na + Cl₂ → 2NaCl,
It is clear that 2 mol of Na react with 1 mol of Cl₂ to produce 2 mol of NaCl.
Firstly, we need to calculate the no. of moles of (35.0 g of Na) and (100.0 g Cl₂):
no. of moles of Na = mass/molar mass = (35.0 g)/(22.989 g/mol) = 1.522 mol.
no. of moles of Cl₂ = mass/molar mass = (100.0 g)/(70.906 g/mol) = 1.41 mol.
From the balanced equation: Na reacts with Cl₂ with (2: 1) molar ratio.
∴ 1.522 mol of Na "limiting reactant" reacts completely with 0.761 mol of Cl₂ "excess reactant".
To calculate the mass of the produced salt (CuCl₂):
2 mol of Na produces → 2 mol of NaCl, from stichiometry.
∴ 1.522 mol of Na produces → 1.522 mol of NaCl.
∴ The mass of the produced salt (NaCl) = (no. of moles)(molar mass) = (1.522 mol)(58.44 g/mol) = 88.95 g ≅ 89.0 g.
Final answer:
To find the maximum amount of NaCl produced from 35.0g of Na and 100.0g of Cl2, determine the limiting reactant and calculate the moles to find the answer of 75.8g.
Explanation:
To determine the maximum amount of NaCl that can be produced from 35.0g of Na and 100.0g of Cl2, you need to identify the limiting reactant in the reaction.
The molar mass of NaCl is 58.44g/mol, so we can calculate the moles of Na and Cl2 to see which one will run out first, limiting the amount of NaCl produced.
The maximum amount of NaCl that can be produced is 75.8g.
How many atoms are in 2 mol of Iron
Answer:
It is equal to Avogadro's number (NA), namely 6.022 x1023. If we have one mole of water, then we know that it will have a mass of 2 grams + 16 grams = 18 grams. Since we only have 0.001 grams, that means that we have NA * = 3.35*1019 molecules of water!
Explanation:
I'm just smart.
At what temperature does the solid start melting?
–20°C
0°C
20°C
80°C
Answer:
0 °C
Explanation:
The melting point of a substance is the temperature at which it changes state from solid to liquid.
Different substance have different melting point.
The melting point of ice at 1 atmosphere of pressure is very to 0 °C this is also known as the ice point.
Answer:
0°C
Explanation:
i am a chemistry nerd and that question any chemistry person can answer without questioning there answer.
Why would an atom become an ion?
An atom becomes an ion to achieve electrical stability. This can occur either by the atom losing electrons and becoming a cation (positive ion), or gaining electrons and becoming an anion (negative ion). This process, known as ionization, typically happens during chemical reactions.
Explanation:An atom may become an ion in pursuit of electrical stability. Atoms are originally neutral, containing equal numbers of protons (positive charge) and electrons (negative charge). Certain atoms become more stable by gaining or losing electrons, altering the balance between protons and electrons and creating a net charge, thereby becoming ions.
There are two types of ions: cations and anions. Cations are positive ions that form when an atom loses electrons. For instance, a sodium atom (Na) could lose one electron to become a cation (Na+). On the other hand, anions are negative ions formed when an atom gains electrons. For example, an oxygen atom could gain two electrons to become an anion (O2-).
The process where an atom gains or loses electrons to form ions is known as ionization. This atomic transformation usually occurs during chemical reactions, especially in the formation of ionic bonds.
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how many moles of oxygen react with 12 moles of aluminum
Answer:
If, for example, we want to know how many moles of oxygen will react with 17.6 mol ... Write the balanced chemical reaction for the combustion of C 5H 12
Explanation:
Which statement correctly compares and contrasts the information represented by the chemical formula and model of a compound? Both show how the atoms in a compound are connected. Models show how the atoms in a compound are connected. Chemical formulas show how the atoms in a compound are connected.
Answer:
Models show how the atoms in a compound are connected.
I just took this instruction so make sure to press that THANKS button!
Final answer:
A chemical formula indicates the types and numbers of atoms in a compound, while a structural formula also shows how atoms are connected. Models, such as ball-and-stick or space-filling, visually represent the geometric arrangement of atoms, with space-filling models showcasing the relative sizes of atoms.
Explanation:
The correct statement that compares and contrasts the information represented by the chemical formula and model of a compound is that both show how the atoms in a compound are connected, but in different ways. A chemical formula, such as the molecular or empirical formula, shows the types and numbers of atoms in a compound but not how they are linked. For more detailed information on atom connectivity, one would look at a structural formula, which includes lines representing bonds between atoms, indicating how atoms are connected in the molecule.
Models of compounds, including stick, ball-and-stick, or space-filling models, provide a visual representation of the arrangement of atoms. A ball-and-stick model displays the geometric arrangement, with sticks representing bonds and balls representing atoms - though not to scale. A space-filling model also represents the three-dimensional arrangement of atoms in a molecule but shows the relative sizes of atoms more accurately than a ball-and-stick model.
40dm3 of gas at 760 torr are heated from 5°C to 50°C what is the new volume
Answer:
46.5 dm3
Explanation:
Charles law
V1/T1= V2/ T2
V2= V1 T2 / T1
V2= 40 278 / 323
V2= 11120/ 323
Answer:
[tex]\boxed{\textbf{46 dm}^{3}}[/tex]
Explanation:
The pressure is constant, so we can use Charles' Law to calculate the volume.
[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
Data:
V₁ = 40 dm³; T₁ = 5 °C
V₂ = ?; T₂ = 50 °C
Calculations:
(a) Convert temperature to kelvins
T₁ = ( 5 + 273.15) = 278.15 K
T₂ = (50 + 273.15) = 323.15 K
(b) Calculate the volume
[tex]\dfrac{40}{278.15} = \dfrac{V_{2}}{323.15}\\\\{ V_{2}} = 40 \times \dfrac{323.15}{278.15}\\\\V_{2} = 40 \times 1.162 = \boxed{\textbf{46 dm}^{3}}[/tex]
18.A 2.50 L sample of dry air in a cylinder exerts a pressure of
3.00 atm at a temperature of 25 C. The cylinder is reduced to
1.00 atm. What is the volume of the gas without a change in
temperature?
Answer:
[tex]\boxed{\text{7.50 L}}[/tex]
Explanation:
The temperature and amount of gas are constant, so we can use Boyle’s Law.
[tex]p_{1}V_{1} = p_{2}V_{2}[/tex]
Data:
[tex]\begin{array}{rclrcl}p_{1}& =& \text{3.00 atm}\qquad & V_{1} &= & \text{2.50 L} \\p_{2}& =& \text{1.00 atm}\qquad & V_{2} &= & ?\\\end{array}[/tex]
Calculations:
[tex]\begin{array}{rcl}3.00 \times 2.50 & =& 1.00V_{2}\\7.500 & = & 1.00V_{2}\\V_{2} & = &\textbf{7.50 L}\\\end{array}\\\text{The volume of the gas is } \boxed{\textbf{7.50 L}}[/tex]
Using Boyle's law, which states that pressure and volume are inversely related at a constant temperature, we find that the volume of the dry air sample increases to 7.50 L when the pressure is reduced to 1.00 atm.
Explanation:The question you asked involves the property of gases described by Boyle's law. This law states that at a constant temperature, the pressure and volume of a gas are inversely proportional. In other words, if the pressure of a fixed amount of gas is decreased, its volume will increase accordingly, assuming the temperature remains the same.
To find the new volume of the gas, we can use the formula P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the final pressure, and V2 is the final volume we're looking for. We know that P1 = 3.00 atm, V1 = 2.50 L, and P2 = 1.00 atm. Plugging these values into the equation, we get: 3.00 atm * 2.50 L = 1.00 atm * V2. Solving for V2, we find that V2 = 7.50 L. So, the volume of the gas after reducing the pressure to 1.00 atm, without changing the temperature, is 7.50 L.
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A nonaqueous solution has a solvent that is not water. Which is an example of a nonaqueous solution?
Answer:
Tincture o iodine.
Explanation:
If a solute is dissolved in a solution that is not water for example, alcohol, ether, carbon disulphide, Carbon tetrachloride and many other carbon based liquids, the resulting solution is classified as a non aqueous solution.
An example of such a solution is tincture of iodine made by dissolving in 1 liter alcohol.
The molarity of iodine is approximately 0.53M
The solution is largely used as a sore disinfectant.
Answer: B
Explanation: on Edg
Which of these is the result of scientific research and not engineering?
A. A new shoe design that features air cushioning for more comfort
and protection
B. The creation of glass with UV protection.
C. A conclusion about diet commonalities among diabetics.
D. The development of a smaller, more compact missile.
Answer:C
Explanation: This is because you did research to find the conclusion, but a new object/invention for the other ones.
Answer:
c. a conclusion about diet commonalities among diabetics.
Explanation:
what tool did Maurice use when studying dna???
Answer:
He used the X-ray tool
Explanation:
Answer:
a x ray
Explanation: mark me brainliest plzzz
Element J is 1s 2s 2p 3s . (i) How many unpaired electrons does J have?
(II) is j a good oxidizing agent or a reducing agent?
(III) state reason for the answer.
Answer:6
Explanation:
3+3
Element J has two unpaired electrons and is likely to be a reducing agent since it can easily lose its single 3s electron.
The electron configuration for element J is understood as 1s² 2s² 2p⁴ 3s₁. To determine how many unpaired electrons it has, we can look at the configuration and see there must be two in the 2p orbital since it can hold up to a maximum of six electrons and there is only four present, thus two are unpaired.
(i) Element J has two unpaired electrons.
(ii) As for it being an oxidizing agent or a reducing agent, elements that easily lose electrons tend to be good reducing agents.
(iii) Given that element J readily loses its single 3s electron and has a high ionization energy, it is likely to be a reducing agent, similar to how sodium reacts with oxygen to release energy and oxidize.
A chemical company produces ammonia using the following reaction:
N2 + 3H2 → 2NH3
They run a reaction meant to fill an order for a customer who would like to purchase 500.0g of ammonia. When the reaction is complete, the company finds they produced only 430.0g of ammonia. What it their percent yield for that reaction?
70.00%
86.00%
116.3%
93.00%
HELPPP PLEASE
Answer:
[tex]\boxed{\text{ 86.00\,\%}}[/tex]
Explanation:
[tex]\text{\% yield} = \dfrac{\text{actual yield}}{\text {theoretical yield}} \times\text{100 \%}[/tex]
Data:
Actual yield = 430.0 g
Theoretical yield = 500.0 g
Calculation:
[tex]\text{\% yield} = \dfrac{\text{430.0 g}}{\text {500.0 g}} \times\text{100 \%} = \boxed{\text{86.00 \%}}[/tex]
A 6.10 M NaCl can be made by adding [x]g of NaCl to a container and making the volume of water up to the 1.00 L line
Answer:
356.484 g.
Explanation:
Molarity (M) is defined as the no. of moles of solute (NaCl) dissolved in a 1.0 L of the solvent.M = (no. of moles of NaCl)/(volume of the solution (L))
M = 6.10 M, volume of the solution = 1.0 L.
∴ No. of moles of NaCl = (M)(volume of the solution (L)) = (6.10 M)(1.0 L) = 6.10 mol.
∵ no. of moles of NaCl = (mass of NaCl)/(molar mass of NaCl)
∴ Mass of NaCl = (no. of moles of NaCl)(molar mass of NaCl) = (6.10 mol)(58.44 g/mol) = 356.484 g.
NaCl mass : 356.85 grams
Further explanationStoichiometry in Chemistry learn about chemicals mainly emphasizes quantitative, such as the calculation of volume, mass, number, which is related to numbers, molecules, elements, etc
Mole
The mole itself is the number of particles contained in a substance amounting to 6.02.10²³
Mole can also be sought if the amount of substance mass and its molar mass is known
[tex] \large {\boxed {\boxed {\bold {mol = \frac {mass} {molar \: mass}}}} [/tex]
known
M NaCl = 6.10 M
Volume = 1.00 L
asked
NaCl mass
solution
molar mass of NaCl: 23 + 35.5 = 58.5 g / mol
mole NaCl = gram / mass
mole NaCl = molarity x volume
mol of NaCl = 6.1 x 1
mole of NaCl = 6.1
NaCl mass = molar mass x mol
mass of NaCl = 58.5 x 6.1
mass of NaCl = 356.85 grams
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Keywords: mole, NaCl, volume, molarity
What are moles? (Quantitative Chemistry)
Answer:
Moles are the amount of substance containing the same number of chemical units.
Explanation:
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Calculate the mass of 0.750 mol of the following substance. Na3PO4.
****Please help, I'm not quite sure on how to set up a problem to solve! : (
Final answer:
To find the mass of 0.750 mol of Na3PO4, calculate the molar mass by summing the atomic masses of Na, P, and O, and then multiply the molar mass by the number of moles. The mass is found to be 122.955 g.
Explanation:
To calculate the mass of 0.750 mol of Na3PO4, we first need to determine its molar mass. We sum the atomic masses of all the atoms in the compound:
Na (Sodium) has an atomic mass of 22.99 g/mol, and there are 3 Na atoms.
P (Phosphorus) has an atomic mass of 30.97 g/mol, and there is 1 P atom.
O (Oxygen) has an atomic mass of 16.00 g/mol, and there are 4 O atoms.
The molar mass of Na3PO4 is thus calculated as:
(3 × 22.99 g/mol) + (1 × 30.97 g/mol) + (4 × 16.00 g/mol) = 163.94 g/mol
Now, to find the mass of 0.750 mol of Na3PO4, we use the formula:
Mass = moles × molar mass
Mass = 0.750 mol × 163.94 g/mol = 122.955 g of Na3PO4
The oxidation number of sulfur in each of the following is +6 except
A) S2O4^2-
B) SO3
C) Na2SO4
D) SO4^2-
Answer:
A
Explanation:
Oxygen always has a -2 oxidation state, sodium always has a +1 Oxidation state
A: 2(S) + 4(-2) = -2 (overall charge)
2S -8 = -2
2S = 6
S = +3
B: S + -6 = 0 (overall charge)
S = +6
C: 2(+1) + S + 4(-2) = 0 (overall charge)
2 + S - 8 = 0
S - 6 = 0
S = 6
D: S + 4(-2) = -2 (overall charge)
S - 8 = -2
S = 6
Answer:
I believe that the answer is A
15 points!!!
describe the characteristics of a molecule of ammonia (NH3). the lewis structure and table of electronegative are given.
the bond polarities are BLANK, the molecular shape is BLANK 2, and the molecule is BLANK 3.
blank 1 options: nonpolar, polar
blank 2 options: bent, linear, tetrahedral, trigonometry planar, trigonal pyramidal.
Blank 3 options: nonpolar, polar
each blank has one option.
Answer:
The bond polarities are polar, the molecular shape is trigonal pyramidal, and the molecule is polar.
Explanation:
What does standard deviation reveal about data?
A. The average of all the data points
B. Which of the data points is most reliable
C. How spread out the data points are
D. The percent error included in the data
Answer:
A. The average of all the data points
Standard deviation is a statistical measure indicating the spread of data points around the mean; a low value signifies data points clustered close to the mean, while a high value indicates more spread out data.
Standard deviation is a statistical measure that reveals how data points in a set are spread out from the dataset's mean. A low standard deviation indicates that the data points are closely clustered around the mean, suggesting little variation. Option C [how data points in a set are spread out]
Conversely, a high standard deviation suggests a wide spread of data points from the mean, indicating greater variation within the dataset. It is important to note that the standard deviation is always a non-negative value; even if all data points are equal leading to a standard deviation of zero, this merely indicates no variability.
When assessing the reliability and variability of data, the standard deviation serves as a vital tool. It helps in understanding the consistency of the data points and in identifying any potential outliers that may influence the overall dataset. Moreover, the concept of standard deviation is valuable for comparing the spread of different datasets and facilitating statistical analysis across various contexts.
What is the boiling point in degrees Celsius of water
Answer:
100 degree celsius
Explanation:
What is the Bronsted-Lowry definition of an acid?
(A) a compound that donates protons
(B) a compound that accepts protons
(C) a substance that increases hydroxide ion concentration
(D)a substance that increases hydronium ion concentration
Answer:
(A) a compound that donates protons .
Explanation:
According to Bronsted-Lowry Model :
Acids are proton donors. Bases are proton acceptors.So, the right choice is:(A) a compound that donates protons .
Bronsted-Lowry defines the compound which (A) donates protons as acid.
Explanation:According to this concept, an acid is a substance that donates hydrogen ion in a chemical reaction. Hydrogen ion is same as a proton as it has only one proton in its atom. According to him, a base is that substance that accepts hydrogen in a chemical reaction.
In a general sense, all proton donors are acids and all proton acceptors are bases. The higher the number of hydrogen ion donated, the more acidic the substance.
Which of the following is the best name for a compound made from calcium and bromine? (CaBr2) calcium bromide calcium dibromide monocalcium dibromide calcium bromine II
Answer:
Calcium bromide
Explanation:
When naming compounds, the use of prefixes depend on the type of bond made. In this case, calcium and bromine form a ionic bond because calcium is a metal and bromine is a non-metal.
Ionic bonds are not named using prefixes. So no matter how many atoms there are, you will simply write the name of the element for the first element.
For the second element, you name it as well, but only use the root name and end it with -ide.
The _____ the temperature of an object the faster the molecules vibrate.
a. higher
b. lower
The higher the temperature of an object the faster the molecules vibrate.
• Kinetic energy is the energy of the motion, which is equivalent to thermal energy at the smallest scale, that is, heating up and kinetic energy are considered as similar thing.
• With vibrations, the molecules bump into each other, thus, transferring kinetic energy to other molecules that at certain occasions radiate this energy as heat.
• When the environment in which molecules prevails gets heated, the absorption of kinetic energy takes place by the molecules and thus more vibrations takes place.
Thus, it can be said that when the temperature of an object is higher the faster the molecules will vibrate.
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Which of the following correctly describes the general process of coal mining and refining? Select one: a. Coal is mined, washed, dried, and then separated from rock particles. b. Coal is mined, dryed, and crushed. c. Coal is mined, moved along a conveyor belt, mixed with water, then dried.
The general process for coal mining and refining is option C.
Coal mining is carried out by two main processes based on the depth, quality, thickness, and structure of coal seam. Based on the depth, coal seam of less than 180ft to the surface is surface mined while coal seems between 180ft.-300ft. are deep mined. The coal mined is transported to a nearby processing plant using a conveyor, train, ship, etc. where it is washed to remove other component like dirt, sulphur, rocks, etc. and afterwards dried.
Calculate the molarity of the solution.
6.02 x 1022 molecules of HCI (molecular weight = 36.5 g/mole) in 2.0 liters of water
M
Answer:
ans. is 0.05
Explanation:
molarity=(mole of solute)/(litre of solution)
Answer:
The molarity of the solution is 0.05 [tex]\frac{moles}{L}[/tex]
Explanation:
Molarity (M) is the number of moles of solute that are dissolved in a given volume.
Molarity is determined by the following expression:
[tex]Molarity (M)=\frac{number of moles of solute}{dissolution volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
Then you should know the amount of moles of HCL. For that you should know that:
The Avogadro Number or Avogadro Constant is called the number of particles that constitute a substance (usually atoms or molecules) and that can be found in the amount of one mole of that substance. Its value is 6.023 * 10²³ particles per mole. Avogadro's number applies to any substance.
Therefore, applying a rule of three, 6.02*10²² molecules correspond to:
[tex]moles=\frac{6.02*10^{22}*1mole }{6.023*10^{23} }[/tex]
moles=0.1 moles of HCl
Applying the definition of molarity:
[tex]M=\frac{0.1 moles}{2 L}[/tex]
M= 0.05 [tex]\frac{moles}{L}[/tex]
The molarity of the solution is 0.05 [tex]\frac{moles}{L}[/tex]
How has the scientific community addressed the safety of chemicals?
A. Chemicals are repeatedly tested, even those that have existed for
a long time.
B. Existing chemicals are tested if they have never been tested
before.
c. Chemicals are tested if they are suspected to have caused a
problem.
D. Only new chemicals are tested.
Answer:
A
Explanation:
Chemicals are repeatedly tested, even those that have existed for
a long time.
Complete the following statements to describe
solids,
liquids, and gases. Select the correct answer from each drop-down menu.
A solid
a definite volume and
a definite shape.
A liquid
a definite volume and
a definite shape.
A gas
a definite volume and
a definite shape
Answer : The correct option is,
A solid : a definite volume and a definite shape.
Explanation :
As we know that there are 3 states of matter :
Solid state : It is defined as a state in which the particles are closely packed and does not have any space between them. This state have a definite shape and volume. For example : iron metal
Liquid state : It is defined as a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state have a definite volume but does not have a fixed shape. For example : water
Gaseous state : It is defined as a state in which the particles are loosely arranged and have a lot of space between them. This state have indefinite volume as well as shape. For example : Any type of gas like, helium gas.
Hence, the correct answer is, a solid has a definite volume and a definite shape.
The goal of this experiment was to answer the
question "What is the effect of a gas' temperature
on its volume?" You formulated the hypothesis
below
To test this hypothesis, you changed the
of the gas between 0 and 100°C
(273 and 373 K) and calculated the resulting
of the gas
DONE
Hypothesis: If a fixed amount of gas is
heated, then the volume will increase because
the heat will cause the molecules of gas to
move faster and further apart.
Answer:
hypothesis is correct, if temp increases particle velocity increases, increasing force and number of collisions therefore, volume increases
Explanation:
Final answer:
The experiment tests Charles's law, which states that the volume of a gas increases with temperature when pressure is constant. This was demonstrated by early scientists like Jacques Charles and is due to the increase in kinetic energy of gas molecules at higher temperatures.
Explanation:
The experiment in question aims to understand the effect of a gas's temperature on its volume, which is a principle demonstrated by Charles's law. Via the controlled experiments of heating a fixed amount of gas and measuring its volume at various temperatures while maintaining constant pressure, we see that the volume indeed increases as temperature rises. This concept was first systematically studied by Jacques Charles and further refined by Joseph-Louis Gay-Lussac, who demonstrated that a plot of volume (V) against temperature (T) at constant pressure is a straight line, confirming that these two variables are directly related.
Charles's initial findings indicated that at a constant pressure, the volume of a gas increases with temperature. This is because, as explained by the kinetic molecular theory, increasing temperature results in gas molecules moving with greater kinetic energy, leading to more frequent and forceful collisions with the container walls, thus expanding the volume unless the pressure is increased. These principles underpin our understanding of gas properties and behaviors and are illustrated in historical graphs and datasets, such as methane gas volume-temperature data graphed in scientific studies.
Which statement about enzymes is true
Answer:
whats the statment sis
Explanation:
y =‐1x + 7 If y has a value of ‐24 what is the value of x?
Answer:
x = 31
Explanation:
-24 = -1x + 7
subract 7 from both sides.
-31 = -1x
divide both sides by -1
31 = x
Which is a chemical property of soda ash?
A.
It's a highly basic substance.
B.
It's a white crystalline powder.
C.
It can dissolve in water.
D.
It can be separated from water by distillation.
Answer:
A. It is a highly basic substance.
Explanation:
Soda ash is the trade name of sodium carbonate (NaCO₃)
Sodium carbonate is a highly basic substance as 100% of the substance is equivalent to 58.48% of sodium oxide.
Its pH is 10.97
It reacts with acids producing a salt, carbon (Iv) oxide and water.
Na₂CO₃₍s₎ + 2HCl₍aq₎ → 2NaCl₍aq₎ + CO₂ +H₂O₍l₎