Moles Test Review

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

Which compound has the smallest molar mass?

• CO
• CO₂
• H₂O
• H₂O₂

Which has a greater mass: 1 mole of scandium or 2 moles of boron?

• scandium
• boron
• neither
• more information is needed.

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

Tags

NGSS.HS-PS1-7

What is the mass in grams of 6.25 mol of copper (II) nitrate?

• 126 g
• 785 g
• 625 g
• 1172 g

Tags

NGSS.HS-PS1-7

How many molecules are in 32.4 grams of phosphorous pentoxide?

• 1.76 x 10²³ molecules
• 0.29 moles
• 1.76 x 10²² molecules
• 0.29 molecules

Tags

NGSS.HS-PS1-7

How many atoms of carbon  are in 6.00g of carbon?

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

Tags

NGSS.HS-PS1-7

The number 6.02 x 10²³ is ______.

• molar mass
• molecules
• Avogadro's number
• hydrate

What is the volume occupied by 1 mole of any gas at STP? 

• 44.8 L
• 22.4 L
• 16.8 L 
• 20.4 L 

What is the volume of 5 moles of oxygen gas at STP? 

• 112 L 
• 22.4 L
• 78.8 L 
• 114.24 L