Question

Write an equation to solve for moles, given molarity and volume. Then write an equation to convert x moles to grams, assuming a molar mass of z grams per mole.

a) Moles = Molarity × Volume
b) Moles = Volume / Molarity
c) Moles = Mass / Molar Mass
d) Moles = Molar Mass × Mass

If x moles are given, the conversion to grams is:
a) Grams = x × Molar Mass
b) Grams = x / Molar Mass
c) Grams = x + Molar Mass
d) Grams = Molar Mass / x

Answer 1

To find moles using molarity and volume, use Moles = Molarity × Volume. To convert moles to grams, multiply the given moles by the molar mass: Grams = x × Molar Mass.

Step-by-step explanation:

To calculate the number of moles of a solute given the molarity and volume, you can use the equation: Moles = Molarity × Volume. This can be written as Moles = M (mol/L) × V (L), where M represents molarity and V represents volume in liters. To convert moles to grams, assuming the molar mass is z grams per mole, you use the equation: Grams = x × Molar Mass, where x is the number of moles.

If you are given x moles, the correct conversion to grams would be: Grams = x × z, which means you multiply the number of moles by the molar mass to get the mass in grams.