Question 1
How many grams of N
2 are required to react with 2.30 moles of Mg in the following process?
3 Mg + N
2→ Mg
3N
2? (Mg = 24.3 g/mol, N = 14.0 g/mol)
◦ 21.5 g
◦ 0.767 g
◦ 64.4 g
◦ 0.027 g
◦ 193.2 g
Question 2
How many grams of sulfuric acid, H
2SO
4, can be obtained from 400 grams of iron ore if the ore is 80.0% by mass FeS? The reactions involved are given below.
4 FeS + 7O
2→ 2 Fe
2O
3 + 4 SO
2
2 SO
2 + O
2→ 2 SO
3
SO
3 + H
2O → H
2SO
4
◦ 557 g
◦ 446 g
◦ 357 g
◦ 287 g
◦ 89.3 g