将甲烷和氧气按一定物质的量之比混合后,点燃,恰好完全反应,测得生成物总质量为18.4克,若将全...

(1)m(H2O)=9g,n(H2O)=9/28=0.5mol,n(H)=0.5*2=1mol,n(CH4)=1/4=0.25mol
(2)m(C)=12*0.25=3g,m(H)=1*1=1g,m(O)=18.4-3-1=14.4g,n(O)=14.4/16=0.9mol,n(O2)=0.9/2=0.45mol
甲烷和氧气之比=0.25:0.45=5:9