Lesson on Calculating Molar Mass and Moles and Molecules

What is the relative molecular mass of CO₂?

• 44

• 32

• 16

• 56

1 mol = _____ g O₂

• 16
• 32
• 8
• 24

Tags

NGSS.HS-PS1-7

How many moles are there in 8g of hydrogen molecules?

• 8
• 4
• 16
• 0.25

Tags

NGSS.HS-PS1-7

How many moles are there in 440g of carbon dioxide molecules?

• 11
• 10
• 16
• 0.25

Tags

NGSS.HS-PS1-7

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

• 40 g
• 80 g
• 16 g
• 32 g

What is the molar mass of calcium hydroxide, Ca(OH)₂?

• 74.1 g/mole
• 57.1 g/mole
• 58.1 g/mole
• none of the above

What is the M_r of NaOH?

• 23
• 44
• 40
• 18

Tags

NGSS.HS-PS1-7

M_r for Na₂CO₃ is

• 100
• 106
• 74
• 90

Tags

NGSS.HS-PS1-7

What is the molar mass of CO₂?

• 22.0 g/mol
• 28.0 g/mol
• 44.0 g/mol
• 56.0 g/mol

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃?

• 96 g/mol
• 130 g/mol
• 232.5 g/mol
• 303.5 g/mol