Unit 4 Final Review

What is the percent yield when 575 g of sulfuric acid are produced in the lab. The theoretical yield of sulfuric acid is 600 g.

• 56.87%

• 95.83%
• 75.00%

• 83.96%

2 Na + 2 H₂O → 2 NaOH + H₂

How many grams of H₂ are produced if 120.0 grams of Na and 80.0 g of H₂O are available?

(two mass to mass problems - smallest answer is the answer)

• 4.48 grams

• 10.30 grams

• 6.04 grams

• 2.84 grams

Calculate the theoretical yield of H₂SO₄ if 500.0 g of SO₃ reacts completely.

SO₃ + H₂O → H₂SO₄

• 613 grams

• 103 grams

• 0.643 grams

• 284 grams

What mass in grams of C₃H₇Cl is produced if 400.0 grams of C₃H₈ reacts?

C₃H₈ + Cl₂ → C₃H₇Cl + HCl

• 457.48 grams

• 712.31 grams

• 550.02 grams

• 231.10 grams

Using the balanced reaction below, how many moles of FeS₂ are reacted to form 6 moles of SO₂?

4 FeS₂ + 11 O₂ → 2 Fe₂O₃ + 8 SO₂

• 3 moles

• 6 moles

• 8 moles

• 10 moles

In the reaction 2 H₂ + O₂ → 2 H₂O, what is the mole ratio of oxygen to water?

• 1:2
• 2:1
• 3:2
• 1:3

If 150.7 grams of LiOH are used in the reaction, how many moles of Fe(OH)₃ are produced?

3 LiOH + 1 Fe(NO₃)₃ → 3 LiNO₃ + 1 Fe(OH)₃

• 2.10 moles

• 4.73 moles

• 0.02 moles

• 35.81 moles

What is the molar mass of Zn(PO₄)₂?

• 255.32 g/mol

• 178.45 g/mol
• 432.90 g/mol
• 318.62 g/mol