We can use the dilution formula to find the volume of the diluted solution to be prepared
c1v1 = c2v2
Where c1 is concentration and v1 is volume of the concentrated solution
And c2 is concentration and v2 is volume of the diluted solution to be prepared
Substituting the values in the equation
15 M x 25 mL = 3 M x v2
v2 = 125 mL
The 25 mL concentrated solution should be diluted with distilled water upto 125 mL to make a 3 M solution
To dilute 25 mL of 15 M nitric acid to prepare a 3 M solution, the final volume after dilution should be c. 125 mL.
To dilute 25 mL of 15 M nitric acid to prepare a 3 M solution, you can use the formula:
C₁V₁ = C₂V₂
Where C₁ = concentration of the stock solution, V₁ = volume of the stock solution, C₂ = final concentration, and V₂ = final volume after dilution.
25 mL x 15 M = 3 M x V₂V₂ = (25 mL x 15 M) / 3 M = 125 mLTo prepare a 3 M solution, you need to dilute the 25 mL of 15 M nitric acid to a final volume of 125 mL.
Correct question is: To what volume should 25ml of 15m nitric acid be diluted to prepare a 3M solution
a. 120 ml
b. 130 ml
c. 125 ml
d. 135 ml
If the pressure of a sample of gas is doubled at constant temperature what happens to the volume of the gas
It will decrease the volume of gas.
The volume of the gas has decreased by 1/2.
( This is for science ) If part “d” of a wave is changed it changes the ____.
A. Amplitude
B. Wavelength
C. Frequency
D. Pitch
E. Volume
If part “c” of a wave is changed it changes the ____.
A. Amplitude
B. Wavelength
C. Frequency
D. Pitch
E. Volume
wavelength i think should be correct
Water can dissolve other substances. Which factor best contributes to this property of water? Water is made up of ionic bonds. Water has weak intermolecular forces. Water is denser than most substances. Water particles are not fixed in place.
Answer: D. Water particles are not fixed in place.
Answer:
D
Explanation:
because it is right
melting ice is an example of which of the following?
a-
endothermic reaction
b-
chemical reaction
c-
isothermic reaction
d-
exothermic reaction
{System:Hello beautiful user! The answer for this question is B-Chemical reaction. It’s chemical reaction because melting ice is being used my a natural chemical and it’s also a reaction from the natural chemical. I hope this helps you! •.•}
What is the solubility of NH4Cl at 50°C?
A.
20 grams
B.
35 grams
C.
40 grams
D.
45 grams
E.
50 grams
The correct answer is E. 50 grams
The solubility of Ammonium Chloride has an increasing trend as the temperature increases. Experiments show that the solubility at 323K is approximately 50.4 grams per 100 grams o water thus this value is close to choice D, 50 grams
Answer: The correct answer is Option E.
Explanation:
Solubility is defined as the amount of substance (known as solute) which is dissolved in a unit volume of liquid substance (known as solvent) to produce a saturated solution at specific temperature and pressure. It is expressed in number of moles of solute present per 100 grams of solvent.
This property is directly dependent on temperature. As, the temperature increases, the solubility of the solute increases and vice-versa.
[tex]\text{Solubility}\propto \text{Temperature}[/tex]
[tex]NH_4Cl[/tex] is an ionic salt whose solubility increases as we increase the temperature.
The solubility of ammonium chloride at 50°C is 50 grams.
Hence, the correct answer is Option E.
What is the mass of 25.0 grams of HF
Answer:
1.25 moles of HF
Explanation:
1 mole = 20.0 grams of HF
So, to calculate mass of 25.0 grams
=25.0*1/20.0
=1.25 moles
Which best describes what happens when a person sees red leaf
A. Human eyes reflect red light back to the leaf
B. The leaf absorbs res light from human eyes
C. Red light reflected from the leaf enters human eyes
D. The leaf radiates all colors of light except red to human eyes
A chemistry student weighs out 0.0634g of formic acid HCHO2 into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Be sure your answer has the correct number of significant digits.
7.65 × 10⁻³ L.
3 sig. fig. as in the mass of formic acid.
ExplanationHow many moles of formic acid?
Relative atomic mass from a modern periodic table:
H- 1.008,C- 12.011, andO- 15.999.Molar mass of formic acid [tex]\text{HCOOH}[/tex]:
[tex]1.008 + 12.011 + 2\times 15.999 + 1.008 = 46.025\;\text{g}\cdot \text{mol}^{-1}[/tex].
Number of moles of formic acid molecules in the 0.0634 gram sample:
[tex]\displaystyle n = \frac{m}{M} = \frac{0.0634}{46.025} = 1.37751\times 10^{-3}\;\text{mol}[/tex].
Keep at least one extra sig. fig. to avoid rounding errors.
How many moles of NaOH?
It takes one [tex]\text{OH}^{-}[/tex] ion to neutralize each carbonyl group [tex]-\text{COOH}[/tex].
There's one carbonyl group in each formic acid [tex]\text{H-}\text{COOH}[/tex] molecule. Each formula unit of NaOH supplies one [tex]\text{OH}^{-}[/tex] ion. As a result, it takes one mole formula units of NaOH to neutralize one mole formic acid molecules.
There are [tex]1.37751\times 10^{-3}\;\text{mol}[/tex] of formic acid in the volumetric flask. It will take the same number of NaOH formula units to reach the equivalence point.
How many liters of NaOH?
[tex]\displaystyle V = \frac{n}{c} = \frac{1.37751\times 10^{-3}\;\text{mol}}{0.1800\;\text{M}}= \frac{1.37751\times 10^{-3}\;\text{mol}}{0.1800\;\text{mol}\cdot\text{L}^{-1}} = 7.65\times 10^{-3}\;\text{L}[/tex].
How many significant figures?
Number of sig. fig. in data involved in the calculation:
3 in the mass of the formic acid,4 in the concentration of NaOH.Take the least number of sig. fig. as the number of sig. fig. in the answer. As a result, the volume of NaOH should be rounded to three sig. fig.
To solve the given titration calculation, first convert the given weight of formic acid into moles. Since formic acid and NaOH react in a 1:1 ratio, the same amount of moles of NaOH is needed. Then, use the molarity of NaOH to find the volume in liters (or milliliters), which comes out to be 7.67 mL.
Explanation:The question involves a titration calculation, which requires knowledge of stoichiometry. Given the weight of formic acid, we first need to calculate the number of moles of it and then use stoichiometry to calculate the equivalent volume of 0.1800M NaOH needed to neutralize the acid.
First, convert the weight of the formic acid (HCHO2) into moles using its molar mass (46.03 g/mol). So, moles of formic acid = 0.0634g / 46.03 g/mol = 0.00138 mol.
Formic acid and NaOH react in a 1:1 ratio, so moles of NaOH needed = moles of formic acid = 0.00138 mol.
Now, use the molarity of NaOH to find the volume. Volume = moles / molarity = 0.00138 mol / 0.1800 mol/L = 0.00767L or 7.67 mL. This is the volume of NaOH solution needed to reach the equivalence point.
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calculate the molarity of 0.289 moles of FeC13 dissolved in 120 ml of solution
Answer:
2.41 M
Explanation:
The molarity is the moles of FeCl3 over the liters of solution. Since you're given mL you need to change it to L which is 0.12 L. 0.289 divided by 0.12 is your answer
Final answer:
The molarity of 0.289 moles of [tex]FeCl_3[/tex] dissolved in 120 mL of solution is 2.408 M.
Explanation:
To calculate the molarity (M) of a [tex]FeCl_3[/tex] solution, you use the formula:
[tex]M = \frac{moles of solute}{ liters of solution}[/tex]
In this case, we have 0.289 moles of [tex]FeCl_3[/tex] dissolved in 120 mL of solution. First, we must convert 120 mL to liters by dividing by 1000 (since there are 1000 mL in a liter), giving us 0.120 liters.
Now plugging the values into the molarity equation:
[tex]M = \frac{0.289 moles}{0.120 L} = 2.408 M[/tex]
Therefore, the molarity of the [tex]FeCl_3[/tex] solution is 2.408 M.
calculate the numbers of moles of krypton gas contained in a 5.00L container at 6.00 atm and 25.0 C if the gas is argon instead of krypton will the answer change
Answer:
n of krypton = 1.23 mol.
The no. of moles will not be changed, if the gas is either argon or krypton.
Explanation:
The no. of moles of a gas (n) can be calculated by the general gas law of ideal gases: PV = nRT,Where, P is the pressure of the gas in atm (P = 6.0 atm).
V is the volume of the gas container in L (V = 5.0 L).
n is the no. of moles of the gas.
R is the general gas constant (R = 0.082 L.atm/mol.K).
T is the temperature of the gas in K (T = 25.0°C + 273 = 298.0 K).
∴ n = PV/RT = (6.0 atm)(5.0 L)/(0.082 L.atm/mol.K)(298.0 K) = 1.228 mol = 1.23 mol.
The no. of moles will not be changed, if the gas is either argon or krypton because it does not depend on the type of the gas.
Which of the following is not a polyatomic ion
B: CaCO₃ is a compound in and of itself thus it is not a polyatomic ion.
12.47 g of ammonium nitrate are dissolved in water, then diluted to 250 ml. What is the molarity of the resulting solution?
= 0.6224 M
Explanation;Molarity is given by the formula;
Molarity = Number of moles/Volume
But moles = mass/Molar mass
Thus;
Moles = 12.47 g/80.043 g/mol
= 0.1556 Moles
Therefore;
Molarity = 0.1556 moles/0.25
= 0.6224 MHow many atoms are in 4NH3
There are 4 N and 12 H so I think 16
There are 16 atoms in 4NH3
What is atom ?The smallest part of the matter is called atom .
An atom contains neutron, proton and electrons.
ExplanationIn the given question there is one molecule of NH3 , there is one Nitrogen atom and three hydrogen atom . So, for four molecule of NH3 there are four nitrogen atom and 4*3 hydrogen atom means twelve hydrogen atom.
So, total number of atoms in 4NH3 is 4+12 = 16
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Explain how wind is connected to convection and radiation.
The earth’s atmosphere is heated through radiation by the sun. This means the wavelengths of the sunlight are absorbed by the molecules hence exciting them. When a mass of air is heated by radiation, it becomes less dense creating an area of low pressure. The air rises and cooler air mass moves in to replace the rising air. This is how winds are created.
Esterfication is what type of reaction?
A. Addition
B. Equilibrium
C. Combustion
D. Neutralization
Esterification is an B. Equilibrium reaction.
Answer: option B, Equilibrium
Explanation: Formation of ester by the reaction of Carboxylic acid and alcohol in the presence of mineral acids is called Esterification.
And entire reaction is a reversible and in equilibrium
A reverse reaction occurs on hydrolysis of Ester.
Hence Reactants and products are in equilibrium.
Example
CH3COOH+C2H5OH <------> CH3COOC2H5 +H2O
The element chorine is represented by symbol ____. (Capitalization is important.)
the element chlorine is represented by the symbol Cl
All first letters on the Periodic Table are Capitalized. The answer is Cl.
Children tend to resemble their parents in many ways; they may have like eye color, hair texture, height, or skin tone. This is because children inherit genes from both parents. A child receives 1/2 of his/her genes from the mother and the other half from the father. Genes are part of our DNA; our DNA makes up the chromosomes in our body and sex cells.
Sex cells or gametes are produced during the process of meiosis. Gametes have 1/2 the number of chromosomes as do regular body cells, like skin or muscle cells. When fertilization takes place, the two sets of alleles from the male gamete (sperm) and the female gamete (egg) are combined.
Many years ago, Gregor Mendel discovered that we have dominant and recessive traits that are determined by our genes. For examples, brown eyes are dominant over blue eyes. Scientists represent the gene for a trait with a letter: capital letter for dominant and lower case letter for recessive. A brown-eye person would have the genotype BB or Bb. A blue-eyes person would have the genotype bb. Whenever a dominant trait is combined with a recessive trait (Bb), the dominant trait most often masked the recessive trait.
Look at the grid above. This is called a Punnett square. It shows the genotypes of two parents and then the possible gametes that could be produced by each parent. We use the Punnett square to show the possible combinations of genes and the resulting traits. In this case, two black rats mate and their potential off-spring could be black (BB, Bb) or white (bb). The chances of having a black rat in this example is 3:4 or 75% and having a white rat is 1:4 or 25%.
Drag the labels to the correct locations within the Punnett square.
Black
Dominant gene
Phenotype
Recessive gene
White
black would be BB .
dominant gene is B.
phenotyope is where it says white fur.
recessive gene is b.
white is bb
Which two elements will most likely form an ionic bond?
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
Answer:
B. Magnesium and Bromine
Explanation:
Magnesium is you solid based element in the compound or bond. With ability to conduct electricity when applied to bromine your non-metal. Bromine is one of the two liquids on the periodic table along with mercury so it can be tricky to test in water. Lastly the test in Edgenuity( or wherever you took this test) the first answer krypton and lithium could be a possible answer, but on the test your correct answer is B. Magnesium and Bromine.
Thank You...
Which unit is not a measurement of volume?
cm
L
ml
cm3
Which unit is not a measurement of volume?
cm
L
ml
cm³
Cm is a measurement for length
Since cm is the unit for the measurement of length, it has not been used to measure volume. L, ml, and cm3 are the units for the measurement of volume.
Volume can be described as the space occupied by the liquid. The liquid has no specific shape however they can attain the shape of the container in which they are kept.
The unit has been used to describe or measure a specific parameter. Units can be interconverted from one to another and help in the equivalent value in another unit.
The unit for the length, volume, weight are all assigned by the standard methods.
The centimeter is the unit of length and has been used for the measurement of matter in terms of length. It can give the length of a piece of land, cloth, etc.
liter, milliliter, and centimeter cube have been the value that has been used for the measurement of the volume.
Since cm is the unit for the measurement of length, it has not been used to measure volume. L, ml, and cm3 are the units for the measurement of volume.
For more information about the measurement unit, refer to the link:
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why does the earth have a liquid water supply and the moon does not
Because the Earth has biological ecosystems that ensure a supply of liquid water, inlcuding an atmosphere, living plant life and gaseous exchange systems that enable liquid water to be produced. None of this applies to the Moon.
Answer:
Because the gravity of the earth, unlike the gravity of the moon, is sufficient so that the earth's water does not evaporate or drain into space.
Explanation:
The most widely accepted explanation of how water on earth came about says that comets and asteroids - which have water in their constitution - bombarded our planet and left that element on its surface. Since the earth and the moon are so close together and occupy almost the same place in space, it is to be imagined that these comets and asteroids also hit the moon and leave water reserves there. However, the moon's gravity is much lower than the earth's gravity. This low moon gravity caused most of its water reservoir to evaporate or drain into space.
Who performed the oil-drop experiment?
In the year 1909, Robert A. Millikan and Harvey Fletcher performed the oil drop experiment.
Answer:
Robert Millikan
Explanation:
(APEX)
The pH of an aqueous solution is 4.32. What is the [OH–]?
A.
6.4 x 10–1 M
B.
4.8 x 10–5M
C.
2.1 x 10–10 M
D.
1.6 x 10–14M
C. 2.1 x 10–10 M
Explanation;pKw=pH + pOH = 14
pOH = 14-4.32
=9.68
But; pOH = -log[OH]
[OH-]=10^(-9.68)
=2.089x10^-10M
≈ 2.1 x 10–10 MAnswer: The concentration of hydroxide ion concentration is [tex]2.08\times 10^{-10}[/tex]
Explanation:
pH is defined as negative logarithm of hydrogen ion concentration. It is basically defined as the power of hydrogen ions in a solution.
To calculate the hydroxide ion concentration of the solution, we need to determine the pOH of the solution first and to do so, we calculate the pOH by the following equation:
[tex]pH+pOH=14\\pOH=14-4.32=9.68[/tex]
pOH is defined as negative logarithm of hydroxide ion concentration. It is basically defined as the power of hydroxide ions in a solution.
The equation used to calculate pOH of the solution is given as:
[tex]pOH=-\log[OH^-][/tex]
pOH of the solution = 9.68
Putting values in above equation, we get:
[tex]9.4=-\log[OH^-][/tex]
[tex][OH^-]=antilog(-9.68)[/tex]
[tex][OH^-]=2.08\times 10^{-10}[/tex]
Hence, the concentration of hydroxide ion concentration is [tex]2.08\times 10^{-10}[/tex]
Which property do gas particles at the same temperature share?
A.) Potential energy
B.) Pressure
C.) Average kinetic energy
D.) Volume
Average kinetic energy
hope this helps :)
The next vice I think it's c
At night, low temperatures can cause rocks to:
melt
contract
expand
At night, low temperatures can cause rocks to CONTRACT.
Answer:
They can cause rocks to contract
Explanation:
if the rocks melt it would have to either be really hot or a chemical reaction and when rocks expand that would need heat so the last answer that is left is contract.
HOPE THIS HELPS
How are igneous rocks classified
maybe centuries classified according to their chemical and mineral composition as felsic, intermediate, mafic, and ultramafic, and by texture or grain size
Explanation:
Igneous rocks -
These type of rocks are formed via the crystallization of the liquid , which is the molten rocks .
The categories of distribution of the igneous rock is -
1. Intrusive or the plutonic rocks .
2. Extrusive or volcanic rocks .
And the classification of Igneous rock is as follows -
1. felsic
2. mafic
Which of the following leads to a higher rate of diffusion?
Cooled gas
Higher molar mass of particles
Higher velocity of particles
Reduced temperature
Higher velocity of particles
Explanation;The diffusion rate is determined by a variety of factors which includes;
Temperature such that the higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly and the diffusion rate will be high.Concentration gradient such that the greater the difference in concentration, the quicker the rate of diffusion.Higher velocity of particles increases the diffusion rate as this means more kinetic energy by the particles and hence the particles will mix and move faster, thus higher diffusion rate.The correct answer is c. Higher velocity of particles leads to a higher rate of diffusion.
Diffusion is the process by which particles spread out from an area of high concentration to an area of lower concentration. The rate of diffusion is influenced by several factors, including the temperature, the molar mass of the particles, and the velocity of the particles.
1. Temperature: Increased temperature results in higher kinetic energy of the particles, which increases their velocity. Therefore, higher temperatures lead to a higher rate of diffusion. Conversely, cooled gas (reduced temperature) would have a lower rate of diffusion.
2. Molar Mass: Heavier particles (higher molar mass) move more slowly than lighter particles because they have more mass to move. Therefore, gases with a lower molar mass diffuse more quickly than those with a higher molar mass.
3. Velocity of Particles: The rate of diffusion is directly proportional to the average velocity of the particles. Faster-moving particles will spread out more quickly, leading to a higher rate of diffusion
In summary, higher velocity of particles is the factor that leads to a higher rate of diffusion. This is because faster-moving particles cover more distance in a given time, leading to a quicker spread of particles from high to low concentration areas.
The oxidation of magnesium to form magnesium oxide is shown by which balanced chemical equation?
A) Mg(s) + O2(g) → MgO(s)
B) 2Mg(s) + O2(g) → 2MgO(s)
C) 2MgO(s) → 2Mg(s) + O2(g)
D) 2Mg(s) → 2MgO(s) + O2(g)
magnesium oxide is: MgO (right side)
so the left side is: Mg + O2
for the equation to be balanced there must be two oxygens on both sides
Mg + O2 = 2MgO
but now the magnesium is uneven, so there must be two magnesiums on each side
the answer is: B) 2Mg + O2 = 2MgO
Answer : The correct balanced chemical reaction will be,
(B) [tex]2Mg(s)+O_2(g)\rightarrow 2MgO(s)[/tex]
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.
Synthesis reaction : A chemical reaction where multiple substances or reactants combine to form a single product.
It is represented as,
[tex]X+Y\rightarrow XY[/tex]
The balanced chemical reaction will be,
[tex]2Mg(s)+O_2(g)\rightarrow 2MgO(s)[/tex]
Which of the following best describes plasma?
A - a group of supercooled particles with very low kinetic energy.
B - an ionized group of particles with low kinetic energy
C - a gas that becomes a solid without first becoming a liquid
D - an electrically charged gas with very high kinetic energy
The correct option is D.
Nowadays, scientists classified substances into four states of matter, which are: solid, liquid, gases and plasma. Plasma are hot ionized gas that is made up of equal number of positively and negatively charged ions. The ions in the plasma have very high kinetic energy which allow them to move around at high speed. Plasma is typically produce by heating gases to very high temperature.
How many grams of chloride ions are in 8.3 g of copper (II) chloride
[tex]4.4\; {\rm g}[/tex].
ExplanationRefer to a modern periodic table for relative atomic mass:
Cu- 63.546;Cl- 35.45.Formula of copper (II) chloride: CuCl₂.
Formula mass of copper (II) chloride:
63.546 + 2 × 35.45 = [tex]134.446\; {\rm g \cdot mol^{-1}}[/tex].
How many [tex]{\rm mol}[/tex] of formula units in 8.3 grams of CuCl₂?
[tex](8.3\; {\rm g}) / (134.446\; {\rm g \cdot mol^{-1}}) \approx 0.0617\; {\rm mol}[/tex]
Note the subscript "2" in the formula CuCl₂. There are [tex]2\; {\rm mol}[/tex] of chloride ions in every [tex]1\; {\rm mol}[/tex] formula unit of CuCl₂.
There would be [tex]2 \times 0.0617\; {\rm mol} \approx 0.123\; {\rm mol}[/tex] of [tex]{\rm Cl^{-}}[/tex] ions in [tex]0.0617\; {\rm mol}[/tex] formula units of CuCl₂.
The mass of [tex]1\; {\rm mol}[/tex] of chloride ion is 35.45 grams.
The mass of [tex]0.123\; {\rm mol}[/tex] of [tex]{\rm Cl^{-}}[/tex] ions will be [tex]35.45 \times 0.123 \approx 4.4\; {\rm g}[/tex].
Round the final value to two sig. fig. since the mass in the question is also 2 sig. fig.
How much does the earth weigh? How far away is the sun?
The Earth weighs, 5.972 × [tex]10^{24}[/tex] kg. For far away the sun is from the Earth is, 92.96 million mi.