Stoichiometry Practice

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g) 12.00 moles of NaClO₃ will produce how many grams of O₂? NaClO₃ = 106.44 g/mol ; O₂ = 32.00 g/mol

• 256 g of O₂

• 576 g of O₂

• 288 g of O₂

• 384 g of O₂

Tags

NGSS.HS-PS1-7

CaC₂(s) + 2H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?

• 119 g

• 21.2 g

• 114 g

• 237 g

Tags

NGSS.HS-PS1-7

How many step will it take for me to go from moles given to moles unknown?

• 1

• 2

• 3

• 4

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

• 6

• 2

• 3

• 1

Use the following equation:
2NaOH(aq) + H₂SO₄(aq) --> 2H₂O(l) + Na₂SO₄(aq)
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide?

• 150.22 g Na₂SO₄

• 593.44 g Na₂SO₄

• 330.04 g Na₂SO₄

• 297.65 g Na₂SO₄

Tags

NGSS.HS-PS1-7

151 grams of Al₂O₃ are produced. How many grams of Al was needed in the reaction? Al + O₂ -------> Al₂O₃ balance first.

• 79.91 g

• 22.4 liters

• 57.8 g

• 142.8 g

Tags

NGSS.HS-PS1-7

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

N₂ +  3H₂ → 2NH₃ 
What is the mole ratio between Nitrogen and Ammonia in the above reaction?

• 1 moles NH₃ / 2 moles N₂ 

• 2 moles NH₃ / 1 moles N₂ 

• 2 moles N₂ / 3 moles NH₃ 

• 1 moles N₂ / 3 moles NH₃ 

Using the balanced equation in question 5, CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
how many grams of H₂O are needed if 3.20 moles of CaC₂ are consumed?

• 115 g

• 28.8 g

• 0.0889 g

• 6.40 g