3. Chemical Reactions

The reduction of iron (III) oxide creates the following reaction: 

Fe₂O₃ (s) + 3 H₂ (g) → 2 Fe (s) + 3 H₂O (g) 

If the above reaction only went to 75% completion, how many moles of Fe₂O₃ were require to produce 0.850 moles of Fe? 

Au₂S₃ + 3 H₂ → 3 H₂S + 2 Au
How many grams of Au can be produced from 500.20 g of Au₂S₃ and 5.67 g H₂?

(CN)₂ + 7 F₂ → 2 CF₄ + 2 NF₃

What is the percent yield of the reaction if 45.0 g of CF₄ are isolated from the reaction between 75.0 g each of (CN)₂ and F₂?

For the following chemical reaction 53.1 g HBrO₄ is mixed with 25.8 g Li₂CO₃. Determine the percent yield if 7.17 g CO₂ is produced.

2 HBrO₄ (aq)  +  Li₂CO₃ (aq)  → H₂O (l)  +  CO₂ (g)  +  2 LiBrO₄ (aq)

Ammonia, NH₃, can be created from the combining of H₂ and N₂ molecules. How many grams of ammonia are isolated when 10.0 g H₂ reacts with excess N₂ with a chemical reaction that has a 79.3% yield?

3 H₂  +  N₂  →  2 NH₃

What is the percent yield of NH₃ if the reaction of 26.3 g of H₂ produces 79.0 g of NH₃?

What is the percent yield of HCl if 42.0 g of HCl are produced from the reaction of 62.0 g of PCl₃?