1)fe+o2-> 2)al+o2-> 3)cr+o2->

ch4 + cl2 = ch3cl + hcl

2ch3cl + 2na = ch3-ch3 + 2nacl

ch3-ch3 + cl2 = c2h5cl + hcl

1)  2al2o3 =электролиз,саf2 = 4al + 3o2 

2) 2al + 6hcl= 2alcl3 +3h2(газ)

3) alcl3+3naoh = al(oh)3(осадок) +3nacl

4) al(oh)3+3hcl= alcl3+3h2o