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【单选题】
有一种由元素C、Cl及F组成的化合物,在常温下为气体。此化合物在27°C,1.01325×10 5 Pa,体积质量为4.93 kg·m -3 ,则该化合物的分子式为:(已知C,Cl,F元素的相对原子质量分别为12,35.5,19)A.
CFCl 3
B.
CF 3 Cl
C.
CF 2 Cl 2
D.
C 2 FCl 3
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