Stoichiometry practice

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

• 6
• 2
• 3
• 1

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Tags

NGSS.HS-PS1-7

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?

• 256.0g of O₂
• 576.0 g of O₂
• 288.0 g O₂

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
About how many grams of H₂O will be produced from 150 grams of Fe₂O₃? 

• 50. grams H₂O
• 60.grams H₂O
• 5000. grams H₂O
• 6000. grams H₂O

What is the mole to mole ratio of propane to carbon dioxide in the equation?

• 1:3
• 1:5
• 1:4
• 1:1

What is the conversion factor from mol to particles?

• 2018= 1 mol
• 6.02 x 10^23 = 1 mol
• 22.4 = 1 mol
• molar mass= 1 mol

What is the molar mass of iron (III) oxide?

• 72 g
• 200 g/mol
• 104 g/mol
• 160 g/mol

Tags

NGSS.HS-PS1-7

2 CO (g) + O₂(g) → 2 CO₂ (g)
In the formation of CO₂ from CO and oxygen, how many Liters of CO₂ are produced by the reaction of 8.00 mols of O₂ with an excess of carbon monoxide at STP?

• 0.178 L
• 358. Liters
• 704 grams
• 0.36 grams

4 Al + 3 O₂ –> 2 Al₂O₃  How much aluminum would be needed to completely react with 45.0 grams of O₂?

• 1.05 moles
• 3.75 moles
• 1.875 grams
• 1.88 moles