3. Chemical Reactions
Percent Yield
Multiple Choice
Multiple ChoiceCyanogen (CN)2 has been observed in the atmosphere of Titan, Saturn’s largest moon, and in the gases of interstellar nebulas. On Earth, it is used as a welding gas and a fumigant. In its reaction with fluorine, carbon tetrafluoride (CF4) and nitrogen trifluoride (NF3) gases are produced:
(CN)2 + 7 F2 → 2 CF4 + 2 NF3
What is the percent yield of the reaction if 45.0 g of CF4 are isolated from the reaction between 75.0 g each of (CN)2 and F2?
A
17.7%
B
1.25%
C
6.40%
D
90.7%
E
60.0%
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