Molarity and Molality

Which of the following is the correct formula for calculating molarity?

• moles/liters of solution

• moles/kg of solvent

• # particles/Avogadro's #

• theoretical yield/actual yield

When calculating molality, Kg of the following are included in the calculation?

• solvent

• solute

• none of these

• solvent & solute

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

• 2.0 M

• 0.22 m

• 135 m

• 2.0m

Molality (m) = moles of solute / _________________________.

• kilogram of solvent

• kiloliter of solvent

• kilometer of solvent

• ounces of solvent

What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?

• 5 mol/kg. solvent

• 4 mol/kg solvent

• 3 mol/kg. solvent

• 2.5 moles /kg solvent

molality is defined as ________________________

• the moles of solute per kilogram of solvent

• moles of solute per liter of solution

• mass of solute/ mass of solution

• mass of solute/ mass of solvent X 100

Molarity is measured in _____.

• moles per g.

• mols per L.

• moles per mm.

• moles per mL.

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?

• 1074 mol
• 0.069 mol
• 1.07 mol
• 62.7 mol

What do molarity and molality have in common?

• Both have "moles solute" in the numerator

• Both have "kg solvent" in the denominator

• Both have "L solution" in the denominator

• Both have "moles solution" in the denominator

Which equation is used to find molarity?

• Moles solute/L solution

• Moles solute/kg solution

• Moles solute/kg solvent

• Grams solute/L solution