下列说法正确的是() A.同温同压下,等质量的甲烷比二氧化碳所

下列说法正确的是()

A.同温同压下,等质量的甲烷比二氧化碳所占有的体积小。

B3.01×1023X气体分子的质量为16g,则X气体的摩尔质量是64g /mol

C0.5L 1mol/L FeCl3溶液与0.2L1mol/L KCl溶液中的Cl-的数目之比为15 : 2

D.100ml 1mol/LNaCl溶液与50ml 1mol/LAlCl3溶液中Cl-物质的量浓度相等

答案

C

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