题目内容

根据乙炔气体完全燃烧时的反应:2C2H2+5O2="=="4CO2+2H2O,可以写出如下的符号式:ν(C2H2):ν(O2):ν(CO2):ν(H20)="="2:5:4:2。据此知识,下列说法错误的是()

A. 参加反应的乙炔和氧气的化学计量数之比为2:5
B. 参加反应的乙炔和生成的二氧化碳的分子个数比为1:2
C. 参加反应的乙炔和氧气的质量比为2:5
D. 参加反应的乙炔和生成的二氧化碳的体积比为1:2

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