Practice for Mass to Mass Stoich Quiz

Magnesium sulfate has a molar mass of 120 grams per mole. What is the mass of 3.0 moles?

• 40 g

• 120 g

• 360 g

• 90 g

Answer explanation

Magnesium sulfate has a molar mass of 120 grams per mole. If you have 48 g of magnesium sulfate, how many moles do you have?

• 0.25 moles

• 2.5 moles

• 0.4 moles

• 1680 moles

Answer explanation

Tags

NGSS.HS-PS1-7

How many moles of hydrogen gas, H₂, are needed to completely react with 6.0 moles of oxygen gas, according to the following balanced chemical equation? 2H₂ + O₂ → 2H₂O

• 3.0 moles

• 6.0 moles

• 12.0 moles

• 141.8 moles

Answer explanation

You might need to view this in light mode, not dark mode

Tags

NGSS.HS-PS1-7

What mass of hydrogen gas, H₂, is needed to completely react with 3.5 moles of oxygen gas, according to the following balanced chemical equation? 2H₂ + O₂ → 2H₂O

• 140 g

• 49 g

• 14 g

• 7 g

Answer explanation

Tags

NGSS.HS-PS1-7

What mass of hydrogen gas, H₂, is needed to completely react with 60 grams of oxygen gas O₂, according to the following balanced chemical equation? 2H₂ + O₂ → 2H₂O

• 1.20 g

• 7.5 g

• 120 g

• 240 g

Answer explanation

Tags

NGSS.HS-PS1-7