w(х.э.)=Ar(х.э.)*n*100%/Mr(вещ-ва)
w(C)=12*1*100/16=75%
w(H)=1*4*100%/16=25%
проверяем: 75+25=100%
ответ: 75%, 25%
w(х.э.)=Ar(х.э.)*n*100%/Mr(вещ-ва)
w(C)=12*1*100/16=75%
w(H)=1*4*100%/16=25%
проверяем: 75+25=100%
ответ: 75%, 25%