Question

这道题该怎么解啊

这道题该怎么解啊求解，各位兄台们

Answer 1

(1)气体的体积不变，也就是V(O2)=V(XO2)+V(YO2)=672ml(2)∵V(XO2)+V(YO2)=672ml，而V(YO2)=2V(XO2)，∴V(XO2)=224ml，V(YO2)=448ml∴n(XO2)=0.01mol，n(YO2)=0.02mol，∴n(XY2)=n(XO2)=0.01mol而m(XY2)+m(O2)=m(XO2)+m(YO2)=0.672×2.56g=1.72g又。