Question 1
The empirical formula of a compound of uranium and fluorine that is composed of 67.6% uranium and 32.4% fluorine is
◦ U
2F
◦ U
3F
4◦ UF
4◦ UF
6◦ UF
8Question 2
The first step in the Ostwald process for producing nitric acid is
4NH
3(g) + 5O
2(g) → 4NO(g) + 6H
2O(g).
If the reaction of 150. g of ammonia with 150. g of oxygen gas yields 87. g of nitric oxide (NO), what is the percent yield of this reaction?
◦ 33%
◦ 49%
◦ 62%
◦ 77%
◦ 100%