#1: The concentration of a solution can be described in several ways. In which of these ways do you calculate the moles of a solute divided by the kilograms of solvent? A. molality B. molarity C. mole fraction D. mass percent

Answers

Answer 1

Answer: The answer is A. molality

A molality is a property of a solution that can be described as the number of moles of a solute divided by the kilograms of solvent

A molarity is a property of a solution that can be described as the number of moles of a solute divided by the litres of the solution.
Mass percent is a property of a solution that can be described as the grams of a solute divided by the grams of the solution and multiplied by 100 (because it is percentage)
Mole fraction is a property of a solution that can be described as the moles of the component divided by total moles of the solution.

Answer 2

Answer:

Answer:

Molality

Explanation:

The other answer has a very helpful explanation! I just confirm for others that this is correct on my test!

Related Questions

How many occupied orbitals does a fluorine atom contain in the ground state?
List and describe two powerful forces of nature caused by plate tectonics
Under which conditions of temperature and pressure would a sample of H2(g) behave most like an ideal gas?(1) 0°C and 100 kPa(2) 0°C and 300 kPa(3) 150°C and 100 kPa(4) 150°C and 300 kPa
Which type of change must occur to form a compound?(1) chemical (3) nuclear(2) physical (4) phase
What is a petroleum by-product that has excellent sealing properties to hold moisture in the skin? a) Talcum powder b) Lanolin c) Astringent d) Petroleum jelly

8. Conclusions Why is it helpful to know how much carbon monoxide (CO) was produced, even though silicon is the product being collected for industrial use?

Answers

It is helpful to know how much carbon monoxide (CO) was produced because it signifies incomplete combustion therefore can represent inefficiency of the process and also carbon monoxide is an air pollutant it is very important to control the emission of this gas.

The periodic table is based on an element'sa. atomic number.
b. atomic mass.
c. molecular size.
d. molecular mass.

Answers

The periodic table of the elements is arranged based on the elements' atomic numbers, starting with 1 (hydrogen) in the top left corner.

How many milliters of a 0.171 solution contains 1.00 g of NaCl

Answers

: Molar mass of NaCl: 35.4+22.9 = 58.3 g/mol

X milliliters (=X/1000 liters) of a 0.171M solution contain 0.171*X/1000 moles of NaCl.
0.171*X/1000 moles of NaCl = 58.3*0.171*X/1000 g = 1 g (as given)
58.3*0.171*X/1000 = 1
X = 100.3

I have no idea what to do or how to do it?

Answers

10) In order to find the conjugate acid of a chemical you just add a hydrogen to the chemical.
examples: the conjugate acid of Cl⁻ is HCl, the conjugate acid of PO₄³⁻ is HPO₄²⁻, the conjugate acid of NH₃ is NH₄⁺, the conjugate acid of HCO₃⁻ is H₂CO₃, and the conjugate acid of H₂O is H₃O⁺
To find the conjugate base of a chemical you just reverse that process (take away a hydrogen).
examples: the conjugate base of H₂SO₄ is HSO₄⁻, the conjugate base of CH₃COOH is CH₃COO⁻, the conjugate base of H₃PO₄ is H₂PO₄⁻, and the conjugate base of H₂O is OH⁻.

When you identify conjugate acids and bases in a reaction you look to see what lost a proton and what gained a proton. The chemical that gave up the proton acted as an acid and produced a conjugate base while the chemical that accepted a proton produced a conjugate acid.
Example: HCl+NaOH⇒NaCl+H₂O The acid is HCl and its conjugate base is Cl⁻ while NaOH was the base and H₂O is the conjugate acid. (you can ignore the sodium since it is a spectator ion).

11) When completing acid base reactions, need to identify the acid and the base since the acid will give a proton the base creating a conjugate base of the acid and conjugate acid of the base. (You need to balance the equation after you determine what the products will be)
example: H₂SO₄+2NaOH⇒Na₂SO₄+2H₂O (SO₄²⁻ is the conjugate base of HSO₄⁻ which is the conjugate base of H₂SO₄. HSO⁻ is created with the first NaOH molecule and then SO₄⁻ is created with the second NaOH.)

12) All acid base reaction form a salt consisting of the cation from the base and anion from the acid.
examples: NaCl could have come from NaOH reacting with HCl. K₃PO₄ could have come from KOH and H₃PO₄.

13) I don't really know how you are supposed to solve it with out knowing the Ka value of H₂S. H₂S is a weak acid and therefore will not dissociate completely in water so the only way of being able to find the concentration of H⁺ ions that dissociate is knowing the Ka value of H₂S and using ice tables. (Ka=[H⁺][A⁻]/[HA] and is basically the equilibrium constant for the acid when put into water where A⁻ is the conjugate base and HA is the acid).

14) Ca(OH)₂ is a strong base and will therefore dissociate completely in water. That means that when you find the concentration of OH⁻ in solution you can multiply that by the volume of the solution (in liters) to find the number of moles of OH⁻. Then you can divide that by 2 to find the number of moles of Ca(OH)₂ needed. pOH=14-pH which means that pOH=4.2. [OH⁻]=10^-pOH which means [OH⁻]=6.3x10^-5 M. 6.3x10^-5Mx3.00L=1.89x10^-4mol OH⁻ which means that (1.89x10^-4)/2=9.46x10^-5mol Ca(OH)₂.

I hope this helps. Let me know if anything is unclear.

Which compound is insoluble in water?(1) calcium bromide (3) silver bromide
(2) potassium bromide (4) sodium bromide

Answers

I think the correct answer from the choices listed above is option 3. It is the compound Silver bromide that is insoluble to water. It has a very low solubility which is approximately 0.14 milligram per liter of water. Hope this answers the question. Have a nice day.

What volume measured in stp will 3.75 grams of helium gas occupy?

Answers

1 mole of any gas will occupy 24dm^3 or 24000cm^3 as one mole of helium weighs 4g it will occupy just under 24000cm^3

Other Questions

The half-life of fluorine-20 is 11.4 seconds. After _______ seconds, 1/4 of the original amount of fluorine-20 will remain

If a sample of gas in a rigid container has a temperature of 28.1°C at pressure of 121.2kPa.What will the pressure increase to if heated to a temperature of 89.3°C?

What is the result of multiplying 2.55 x 10^10 m x 3.5 x 10^-7m using proper significant figures and scientific notation.1. 8.925 x 10^2 m^22. 8.92 x 10^1 m^23. 8.92 x 10^24. 8.9 x 10^3 m^2

In the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many grams of hydrogen gas will be produced from 125.0 milliliters of a 6.0 M HCl in an excess of Mg?