Pre-Mole Conversions Quiz

Which of the following are the correct units for molar mass?

• grams

• mol/grams

• mol

• grams/mol

What is the molar mass of titanium (Ti)? Be sure to use the correct rounding for molar mass!

What is the molar mass of KNO₃? Be sure to use correct rounding for molar mass!

True/False: There are 6.022 x 10²³ atoms in every gram of a substance.

• True

• False

True/False: To convert from moles to grams of a substance, you must multiply by the molar mass.

• True

• False

How many grams of rubidium (Rb) are in 8.00 moles?

Be sure to use correct rounding for molar mass and use 3 sig figs in your answer.

How many atoms are in 9.20 moles of hydrogen (H₂)?

• 5.54 x 10²³

• 18.4

• 1.53 x 10²³

• 4.6

How many grams are in a sample of Na₂SO₄ if there are 1.11 x 10²² atoms?

Be sure to use correct rounding for molar mass and use 3 sig figs in your answer.