FINAL REVIEW 2

Which compound has the smallest molar mass?

• CO
• CO₂
• H₂O
• H₂O₂

How many moles are in 16.94g of water?

• 16.94
• 0.9403
• 305.2
• 1.063

What is the mass of 1.2 moles of IrI₃?

• 570 g
• 690 g
• 320 g
• 957 g

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

Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?

• 1 g Ti / 47.84 mol Ti
• 1 mol Ti / 47.84 g Ti
• 47.84 mol / 1 g Ti
• 47.87 g Ti / 1 mol Ti

Avogadro's number of representative particles is equal to one_____.

• kilogram
• gram
• kelvin
• mole

What is the molar mass of (NH₄)₂CO₃ ?

• 144 g
• 138 g
• 96 g
• 78 g

The empirical formula for a compound that contains 36 g C, 8.0 g O, and 6.0 g H is

• C₄H₆O
• C₆H₁₂O
• C₉H₂O₄
• C₆H₁₂O₆

A compound is found to have 52.0 g of zinc (Zn), 9.6 g of carbon (C), and 38.4 g of oxygen (O).  What is the empirical formula?

• Zn₂(CO₃)₂
• Zn₂C₂O₆
• ZnCO
• ZnCO₃

The percent composition, by mass, of nicotine is 74.1% C, 8.60% H and 17.3% N.  The molar mass of nicotine is 162 g/mol.  Determine the molecular mass of nicotine.

• C₁₀H₁₄N₂
• C₅H₇N
• C₁₇H₄₃N₄
• C₂₀H₂₈N₄