Molecular Chemistry

Mass and the Mole Part 2

Multiple Choice

What is the definition for Avogadro's number?

• number of grams per one mole of a substance
• whole number ratio that is a multiple of a chemical formula
• simplest, whole number ratio of a chemical formula
• 6.02 x 10^23 particles per one mole of a substance

Multiple Choice

How many water molecules are in 5.2 moles of water?

• 6.02 x 10²³
• 5.2
• 3.1304 x 10²⁴
• 8.638 x 10^-24

Multiple Choice

What is the definition of molar mass?

• number of grams per one mole of a substance
• whole number ratio that is a multiple of a chemical formula
• simplest, whole number ratio of a chemical formula
• 6.02 x 10^23 particles per one mole of a substance

Multiple Choice

What is the molar mass of AuCl₃?

• 96 g
• 130 g
• 232.5 g
• 303.3 g

Multiple Choice

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

Multiple Choice

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

• 40 g
• 80 g
• 16 g
• 32 g

Multiple Choice

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g
• 19.4 g
• 673 g
• 389 g

Multiple Choice

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

Multiple Choice

How many moles of carbon dioxide would be found int 11.2 L of the gas?

• 1 mol

• 0.5 mol

• 0.25 mol

• 0.05 mol