Molar Mass, Percent Comp. , Mass-Mole Calcs. & Autumn Leaves

Whats the molar mass of KOH

• 98.02 grams per mole

• 234.21 grams per mole

• 56.10 grams per mole

• 21.98 grams per mole

What is the molar mass of Zn(C₂H₃O₂)₂ ?

• 150.89 grams per mole

• 200.02 grams per mole

• 183.5 grams per mole

• 50.90 grams per mole

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

The molar mass of Barium Nitrate Ba(NO₃)₂ is:

• 180.5

• 176.5

• 261.3

• 287.7

How many moles are in 50 grams of Calcium Bromide, CaBr₂?

• 0.75

• 1.25

• 0.25

• 0.55

What is the mass of 2.50 mol of oxygen gas O₂?

• 40.0 g
• 80.0 g
• 16.0 g
• 32.0 g

What is the mass of 2.50 mol of oxygen gas (O₂)?

• 40.0 g

• 80.0 g

• 16.0 g

• 32.0 g

What percentage of the total atomic mass of lithium phosphide (Li₃P) is composed of phosphorus?

• 13%

• 29%

• 40%

• 60%

What is the percent composition of Benzene, C₆H₆?

• C = 50%
  H = 50%
• C = 85.7 %
  H = 14.3%
• C = 92.2%
  H = 7.8%
• C = 71.9%
  H = 28.1%

What is the percent by mass of fluorine in CaF₂ (molar mass = 78 g/mol)?

• 24%
• 49%
• 51%
• 65%