Understanding Formula Mass and Molar Mass

What is the unit used for expressing formula mass?

• Grams

• Kilograms

• Atomic Mass Unit (AMU)

• Moles

Which of the following is a synonym for formula mass?

• Molecular mass

• Atomic weight

• Molar volume

• Density

How do you calculate the formula mass of a compound?

• By using the molar volume

• By dividing the total mass by the number of atoms

• By multiplying the number of atoms by the atomic mass for each element and summing them up

• By adding the atomic numbers of all elements

What is the formula mass of formaldehyde (CH2O) in AMU?

• 29.0180 AMU

• 32.0420 AMU

• 28.0134 AMU

• 30.0260 AMU

What does one mole of a substance represent in terms of Avogadro's number?

• 9.022 x 10^23

• 3.022 x 10^23

• 6.022 x 10^23

• 1.022 x 10^23

How is the molar mass of a compound expressed?

• In cubic meters per mole

• In kilograms per mole

• In liters per mole

• In grams per mole

What is the relationship between molar mass and formula mass?

• Formula mass is always greater

• Molar mass is always greater

• They are numerically equivalent

• They are inversely proportional

In the example of sodium chloride, what is the molar mass of NaCl?

• 54.443 g/mol

• 56.443 g/mol

• 60.443 g/mol

• 58.443 g/mol

What is the correct terminology for the number of units in an ionic compound like sodium chloride?

• Formula units

• Ions

• Atoms

• Molecules

How many formula units of sodium chloride are in a 1.254 kg sample?

• 1.292 x 10^25

• 1.092 x 10^25

• 1.192 x 10^25

• 1.392 x 10^25