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Multiple Choice

Cyanogen (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?


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