Quiz #7: Molar Mass and Conversions

What is the molar mass of CO₂?

• 12 g/mol

• 16 g/mol

• 32 g/mol

• 44 g/mol

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

What is the molar mass of B₂(CO₃)₃?

• 82 g/mol

• 95 g/mol

• 39 g/mol

• 202 g/mol

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

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

What is the mass in grams of 6.25 mol of Cu(NO₃)₂?

• 126 g

• 785 g

• 625 g

• 1175 g

What is the molar mass of AuCl₃?

• 96 g

• 130 g

• 233 g

• 302 g

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g

• 19.4 g

• 673 g

• 389 g

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

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

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

• 40 g
• 80 g
• 16 g
• 32 g