M(C5H12)=72 г/моль w(H12)=12/72*100%=17% w(C5)=100%-17%=83%
C2H5Br
M(C2H5Br)=109 г/моль w(C2)=24/109*100%=22% w(H5)=5/109*100%=5% w(Br)=100%-22%-5%=73%
M(C5H12)=72 г/моль
w(H12)=12/72*100%=17%
w(C5)=100%-17%=83%
C2H5Br
M(C2H5Br)=109 г/моль
w(C2)=24/109*100%=22%
w(H5)=5/109*100%=5%
w(Br)=100%-22%-5%=73%