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Question 1 (Essay Worth 4 points)

What is the limiting reactant when 6.8 moles of iron react with 8.9 moles of oxygen gas?

Unbalanced equation: Fe + O2 → Fe2O3

Show, or explain, all of your work along with the final answer.




Question 2 (Essay Worth 4 points)

How many grams of calcium phosphate can be produced when 89.3 grams of calcium chloride reacts with excess sodium phosphate?

Unbalanced equation: CaCl2 + Na3PO4 → NaCl + Ca3(PO4)2

Show, or explain, all of your work along with the final answer.




Question 3 (Essay Worth 4 points)

How many grams of water can be produced when 8.73 moles of benzene (C6H6) react with excess oxygen?

Unbalanced equation: C6H6 + O2 → CO2 + H2O

Show, or explain, all of your work along with the final answer.




Question 4 (Multiple Choice Worth 3 points)

When 8 moles of lithium metal react with excess oxygen gas, how many moles of lithium oxide can be produced?

2 Li + O2 → Li2O

2

4

8

16

Question 5 (Multiple Choice Worth 3 points)

If 59.3 grams of potassium chlorate decomposes, how many grams of oxygen gas can be produced?

2 KClO3 → 2 KCl + 3 O2

15.5 g O2

23.2 g O2

31.0 g O2

46.4 g O2

Question 6 (Multiple Choice Worth 3 points)

When 6.0 mol Al react with 13 mol HCl, what is the limiting reactant, and how many moles of H2 can be formed?

2 Al + 6HCl → 2 AlCl3 + 3 H2

Al is the limiting reactant, 9.0 mol H2 can be formed

HCl is the limiting reactant, 6.5 mol H2 can be formed

Al is the limiting reactant, 6.0 mol H2 can be formed

HCl is the limiting reactant, 4.3 mol H2 can be formed

Question 7 (Essay Worth 4 points)

How many grams of magnesium oxide can be produced when 97.2 g Mg react with 88.5 g O2?

Unbalanced equation: Mg + O2 → MgO