Question

© State whether the products in the following word
equations are formed from the chemical
combinations of elements, compounds or both.
(a) sodium + water → sodium hydroxide + hydrogen
(b) iron + sulphur-iron sulphide
(c) calcium carbonate + nitric acid
calcium nitrate + carbon dioxide + water

Answer 1

1) H2 (g ) + Cl2(g) => 2 HCL (l) . chemical equation is balanced because to follow the law of conservation of that is. in a balanced chemical equation has equal number of atoms of different elements in the reactant as well as product.

hope it is helpful

Answer 2

(a) Both

(b) Element

(c) Both