Chem Final Review 1

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13.0 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.2%

• 1.04%

2Fe₂O₃ + 3C → 4Fe + 3CO₂

You react 28.0 grams of carbon with excess iron (III) oxide. You find the actual yield to be 100.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

• 97.3%

• 103%

• 0.973%

• 15.5

SO₂ + PCl₅ --> SOCl₂ + POCl₃
How much SOCl₂ is produced when 16.2g SO₂ react with 13.7g PCl_5? 

• 7.83g

• 30.1g
• 26.4g
• 19.8g 

What is the formula of Iron(III) oxide?

• FeO

• FeO₂

• Fe₂O₃

• Fe₃O₂

Which equation represents a single replacement reaction?

• 2Al + 6HCl --> 2AlCl₃ + 3H₂

• 2NaCl --> 2Na + Cl₂

• NaCl + AgF → NaF + AgCl

• 2H₂ + O₂ --> 2H₂O

Which of these elements does not exist as a diatomic molecule?

• Ne

• F

• H

• I