CP Stoichiometry Homework Set 4

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Answer the following questions showing all work. Where needed, write the balanced chemical reaction.

1. How many grams of elementary copper did I make if I also made 92.5g CO₂ using following chemical equation.

2 CuO_(s) + 1 C_(s) --> 2 Cu_(s) + 1 CO_2(g)

2. How many grams of magnesium iodide do I make if I consumed 371g of elementary iodine by the following chemical equation?

1 Mg_(s) + 1 I_2(s) --> 1 MgI_2(s)

3. How many grams of ammonia (NH₃) do I have if I consumed 42.1g of hydrogen gas?

1 N_2(g) + 3 H_2(g) --> 2 NH_3(g)

4. How many grams of Iron (III) oxide do I need to make 35.4 grams of aluminum oxide?

1 Fe₂O_3(s) + 2 Al_(s) --> 2 Fe_(s) + 1 Al₂O_3(s)

Answers:

1) 269g Cu
2) 406g Mg₁I₂
3) 196g NH₃
4) 55.5g Fe₂O₃