Cac2-> c2h2-> ch3oh-> c2h5oh-> c2h4-> c2h5-> c2h5oh-> c4h6-> c4h8br2

1)cac2+2hoh=ca(oh)2+c2h2

2)2c2h2+5o2=4co2+2h2o

co2+c=2co

co+2h2=ch3oh

3)ch3oh+hcl=ch3cl+h2o

2ch3cl+2na=2nacl+c2h6

ch3-ch3+cl2=ch3-ch2cl+hcl

ch3-ch2cl+koh=ch3-ch2oh +kcl

3)c25oh=c2h4+h2o

4)c2h4+h2=c2h6

5)c2h6+cl2=c2h5cl+hcl

c2h5cl+naoh=c2h5oh+nacl

c2h5oh+hcl=c2h5cl+h2o

2c2h5cl+2na=2nacl+c4h10

c4h10=c4h6+2h2

c4h6+2hbr=c4h8br2

молекулярная масса хо2 = 44

а(х) + 2а(о)=44

а(х)=44-2*16

а(х)=12 г/моль

углерод

2kcl3=2kcl+3o2

2b+3o2=2bo3

4al+3o2=2al2o3

2al+3s=al2s3

4p+5o2=2p2o5

h2+cl2=2hcl 

у меня правильно 100%