Limiting reagent and % yield

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.15%

• 1.04%

2Fe₂O₃ + C → Fe + 3CO₂

You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

• 58.83%

• 308%

• 6435%

• 15.5

P₄ + 3O₂ --> P₄O₆ 
What is the limiting reactant is 12 moles of P₄ react with 15 moles of O₂?

• P₄
• O₂
• P₄O₆ 
• none of the above

Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced? 
3AgNO₃  + Na₃(PO₄)  --->  Ag₃(PO₄)  + 3NaNO₃

• 164 g
• 64 g
• 146 g
• 164 moles

Cl₂ + 2 KBr → Br₂ + 2 KCl

How many grams of potassium chloride can be produced from 356 g of Cl₂ and 356 g of potassium bromide?

• 749 g

• 223 g

• 479 g

• 814 g

3CaCO₃ + 2FePO₄ --> Ca₃(PO₄)₂ + Fe₂(CO₃)₃

If 100.g of CaCO₃ reacts with 45.0g of FePO₄, how much of the excess reagent is left over after the reaction is complete?

• 57.3 g of sodium phosphate

• 55.2g of calcium carbonate

• 25.0 g of calcium carbonate

• 16.9 g of sodium phosphate

2 Al + 3 Cl₂ ---> 2 AlCl₃.

If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

• AlCl3

• Cl2

• Al

6Na + Fe₂O₃ --> 3Na₂O + 2Fe

If you are provided 200g of sodium and 250 grams of iron(III) oxide, how much of excess reagent is left?

• 232 g

• 18 g

• 250 g

Al(OH)₃ + 3HCl --> 3H₂O + AlCl₃

14 grams of Al(OH)₃ is completely reacted with excess hydrochloric acid. If you actually recovered 22.0 grams of aluminum chloride, what is the percent yield of the reaction?

• 100%

• 25%

• 92%

• 69%

Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl₂.

Mg + 2HCl --> MgCl₂ + H₂

• Mg

• H₂

• MgCl₂

• HCl