Вот, надеюсь помог. Обращайся,если будет нужна помощь :)
C3h8+cl2=>c3h7cl+hcl
c3h7cl+naoh=>c3h7oh+nacl
c3h7oh=>h20+c3h6
c3h6+br2=>c3h6br2
W(C)= 0.96*100/3.16=30.37%
<span>w(H)= 0.12*100/3.16=3.79%
</span><span>w(Ca)= 0.8*100/3.16=25.3% m(O)=3.16- (.96+0.12+0.8)=1.28
</span><span>w(Ca)= 1.28 *100/3.16=40.5%
</span>X:Ү: Z:N= 30.37/12 :3.79/1 :25.3/40 :40.5/16=3.9:5.9:1:3.9=4:6:1:4 простейщая формула в-ва
C4H6CaO4