Question 1
Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2 Mg(s) + O
2(g) → 2 MgO(s)
When 4.00 g of magnesium burns, what is the theoretical yield of magnesium oxide?
◦ 4.00 g
◦ 6.63 g
◦ 0.165 g
◦ 3.32 g
◦ 13.3 g
Question 2
Nitroglycerin, used both in medicine and as an explosive, can be prepared by the carefully controlled reaction of glycerol (C
3H
8O
3) with nitric acid, as symbolized by:
C
3H
8O
3 + 3 HNO
3→ C
3H
5N
3O
9 + 3 H
2O
What mass of nitric acid is required for the production of 2.8 g of nitroglycerin by a process having a 67% yield?
◦ 2.3 g
◦ 0.39 g
◦ 1.6 g
◦ 3.5 g
◦ 1.2 g