Editing More Stoichiometry Precent Yield Problems

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Answer the following questions showing all work. 
 
1) If one adds 4.25g Copper (I) oxide to excess Carbon so the following will go to completion. If it was found that 0.667g of Carbon dioxide was actually produce, what is the theoretical/stoichiometric yield and percent yield of Carbon dioxide?

2 <nowiki>CuO</nowiki>(s) + 1 C(s) --> 2 Cu(s) + 1 CO2(g)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2) Excess Hydrogen gas reacts with 44.3L of Nitrogen gas (@STP) to produce Ammonia via the following reaction.

1 N2(g) + 3 H2(g) --> 2 NH3(g)

If 52.4g of Ammonia was produced, what is the theoretical/stoichiometric yield and percent yield of Ammonia. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3) One reacts 35.4g of Aluminum metal with excess Sulfuric acid (H2<nowiki>SO</nowiki>4) to produce Aluminum sulfate and Hydrogen gas. If it was determined that one collected 36.8L of the Hydrogen gas (@STP), what is the theoretical/stoichiometric yield and percent yield of Hydrogen gas? 
2 Al(s) + 3 H2<nowiki>SO</nowiki>4 (aq) --> 1 Al2(SO4)3 (aq) + 3 H2 (g) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4) 79.3g of elemental oxygen gas reacts with excess elemental hydrogen gas to produce water via the following synthesis reaction 
2 H2 (g) + 1 O2 (g) --> 2 H2O(g) 
It was found that experimentally, 57.3g of water was produced. What is the theoretical/stoichiometric yield and percent yield of water. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Answer: 
1) 1.17g, 57.1% 
2) 67.2g, 78.0% 
3) 44.1L, 83.4% 
4) 89.2g, 64.2%

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