Question

S+ o2 = so2 al +hcl = alcl+h2 cu(oh)2=cuo+h2o al2o3 +h2so4+ h2o раставить коэфицент 2 большие это индексы пишуться снизу

Answer 1

$6Al + 18HCL = 6AlCl_{3} + 9H_{2}$ или $2AL + 6HCL = 2ALCL_{3} + 3H_{2}$
$Cu(OH)_{2} = CuO + H_{2}O$
$Al_{2}O_{3} + 3H_{2}SO_{4} = Al_2(SO_4)_{3} + 3H_{2}O$

Answer 2

$S+O _{2} =SO _{2} \\ 2Al+6HCl=2AlCl _{3} +3H_{2} \\ Cu(OH) _{2} =CuO+H_{2} O \\ Al _{2} O _{3} +3H _{2} SO_{4} =Al _{2} (SO _{4} ) _{3} +3H _{2} O$