Unit 4: The Mole Review

How many atoms of carbon are in five molecules of propane, C₃H₈?

• 40
• 3
• 15
• 8

What is the mass of 0.89 mol of calcium chloride (CaCl₂)?

• 0.89 g
• 99 g
• 99 amu
• 0.89 amu

What is the mass of one mole of CO₂?

• 44.0 amu
• 44.01 amu
• 44.01 g
• 44.0 g

How many moles of barium nitrate, Ba(NO₃)₂, contain 6.8 x 10²⁴ formula units?

• 6.02 x 10²³ formula units
• 11 moles
• 11 formula units
• 11 g

What is a solute and solvent?

• Solute - what solvent is being added to, in larger amount
  Solvent - what is being dissolved, smaller amount
• Solute -always a solid
  Solvent - water
• Solute - result of mixing
  Solvent - before mixing
• solute - what is being dissolved, smaller amount
  Solvent - what solute is being added to, in larger amount

What are the units for each of the following (in order):
- atomic mass
- formula mass
- molar mass

• atomic mass = g
  formula mass = amu
  molar mass = g
• atomic mass = amu
  formula mass = g
  molar mass = g
• atomic mass = amu
  formula mass = amu
  molar mass = g/mol
• atomic mass = amu
  formula mass = g
  molar mass = g/mol

How many hydrogen atoms are in 8.46 moles of methane, CH₄?

• 33.84 atoms
• 2.04 x 10²⁵ atoms
• 2.04 x 10²⁵ molecules
• 34 atoms

What is the difference between a formula unit and a molecule?

• formula unit - ionic bond
  molecule - covalent bond
• formula unit - big
  molecule - small
• formula unit - covalent bond
  molecule - ionic bond
• formula unit - small
  molecule - big

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules

If you burned 6.10 x 10²⁴ molecules of ethane (C₂H₆), what mass of ethane did you burn?

• 304 g
• 10.1 mol
• 10.1 g
• 30 g