Question

Plzzzz solve it ....fast..

Answer 1

Answer (5) : A chemical equation in which the total number of atoms of each element is same on both sides, i.e., reactants and products, is called a balanced chemical equation.

An equation should be balanced in order to satisfy 'law of conservation of mass'.

Answer (6) :

(i) $3H_{2} (g) + N_{2}(g) \longrightarrow 2NH_{3} (g)$

(ii) $2H_{2}S (g) + 3O_{2}(g) \longrightarrow 2H_{2}O(l) + 2SO_{2}(g)$

(iii) $3BaCl_{2}(aq) + Al_{2}(SO_{4})_{3} (Aq) \longrightarrow 2AlCl_{3}(aq) + 3BaSO_{4} \downarrow$

(iv) $2K(s) + 2H_{2}O (l) \longrightarrow 2KOH(aq) + H_{2} \uparrow$

Answer 2

Explanation:

1) Hydrogen gas combining with nitrogen gas to give ammonia gas.

The balanced chemical reaction will be given as:

$3H_2+N_2\rightarrow 2NH_3$

2)Hydrogen sulfide when burns in air it gives water and sulfur dioxide.

The balanced chemical reaction will be given as:

$2H_2S+3O_2\rightarrow 2H_2O+2SO_2$

3) When barium chloride reacts with aluminum sulfate it gives white precipitate of barium sulfate and aqueous solution of aluminum chloride.

The balanced chemical reaction will be given as:

$3BaCl_2+Al_2(SO_4)_3\rightarrow 3BaSO_4(ppt)+2AlCl_3(aq)$

4) Potassium reacts with water to give potassium hydroxide and hydrogen gas.

The balanced chemical reaction  will be given as:

$K(s)+H_2O(l)\rightarrow KOH(aq)+H_2(g)$