I need help solving all of these problems help plsss! help

1) the substances on the left side are the reactants and the substances on the right are the products
2) the coefficients are 6,2,3
The subscripts are 2,3
3) 6 H on the left : 6H on the right
4) 6 Cl on the left : 6 Cl on the right
5) 2 Al on the left : 2 Al on the right
6) The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.