Moles/% Comp Review

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol
• 94.842 g/mol
• 38.822 g/mol
• 201.648 g/mol

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%

How many atoms of iodine are in a mole of iodine?

• 53
• 63.55g
• 126.9
• 6.02 x 10²³

What would be the mass of 1.5mol H₂O

• 20
• 27
• 32
• 40

We use the periodic table to calculate...

• mass
• molar mass
• volume
• moles

What is the molar mass of one molecule of Nitrogen N₂?

• 14.01 amu
• 14.01 g
• 28.02 g
• 28.02 amu

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g

• 19.4 g

• 673 g

• 389 g

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

• 44.01 moles
• 1421.52 moles
• 32.3 moles
• 0.73 moles

0.75 mole of copper (Cu) is equal to how many atoms?

• 8.03 x 10²³ atoms

• 6.02 x 10²³ atoms

• 4.51 x 10²³ atoms

• 3.11 x 10²³ atoms