Mole-to-Mole Stoichiometry Quiz

Using the balanced equation:

Mg + 2HCl --> MgCl₂ + H₂

How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

• 3.8 moles

• 15 moles

• 7.5 moles

• 23 moles

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

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

Using the following equation:

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)

How many moles of iron can be made from 6.35 moles H₂?

• 4.23 moles Fe

• 6.35 moles Fe

• 9.53 moles Fe

• 2.56 moles Fe

N₂ + 3H₂ → 2NH₃

How many moles of hydrogen are needed to react with 2.93 moles of nitrogen?

• 8.79 moles

• 5.86 moles

• 0.993 moles

• 2.93 moles

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol
• 1.0 mol
• 10.1 mol
• 4.5 mol

4NH₃ + 5O₂-->4NO + 6H₂O
What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15
• 18
• 20
• 24

For the following reaction, how many moles of pure copper is need to produce 8 moles of pure silver?

2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

• 1 moles

• 2 moles

• 4 moles

• 8 moles

S₈ + 12 O₂ → 8 SO₃

How many moles of S₈ is needed to produce 12 moles of SO₃?

• 1

• 1.5

• 2

• 12

S₈ + 12 O₂ → 8 SO₃

How many moles of S₈ is needed to react with 3 moles of O₂?

• 0.25

• 1

• 4

• 36