Stoichiometry Quiz Before Spring Break

Determine the mass of calcium hydroxide produced when calcium carbide reacts with 0.64g of water according ot the following equation

CaC₂ + 2H₂O --> Ca(OH)₂ + C₂H₂

• 10.31 g Ca(OH)₂

• 41.31 g Ca(OH)₂

• 1.31 g Ca(OH)₂

• 31 g Ca(OH)₂

Tags

NGSS.HS-PS1-7

Determine the mass of lithium hydroxide produced when 0.38g of lithium nitride reacts with water according to the following equation

Li₃N + 3H₂O --> NH₃ + 3LiOH

• 11.78 g LiOH

• 0.78 g LiOH

• 12.78 g LiOH

• 21.78 g LiOH

Tags

NGSS.HS-PS1-7

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6
• 2
• 3
• 1

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7

2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g)  
12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂
• 576 g of O₂
• 288 g O₂

Tags

NGSS.HS-PS1-7