今有H2、CO、CH4的体积比为1:1:2的混合气体VL ,当其完全燃烧时,所需O2的体积为(相同条件下)           &

问题描述:

今有H2、CO、CH4的体积比为1:1:2的混合气体VL ,当其完全燃烧时,所需O2的体积为(相同条件下)                                                                                                                                           (     )
A.1.25VL                       B.0.75VL                                C.5VL                               D.VL  

0.25*0.5*2V+0.5*2V==1.25V
故选A