Choose all the answers that apply.

which of the following equations are balanced?

2h2 + o2 → 2h2o

2s + 3o2 → 2so3

li + cl2 → licl

2k + 2h2o → h2 + 2koh

2fe + cu(no3)2 → 2cu + fe(no3)2

Answer : The balanced chemical equations are:

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

(1) The given chemical reaction is,

This reaction is a balanced chemical reaction because in this reaction the number of atoms of individual elements present on reactant side must be equal to the product side.

(2) The given chemical reaction is,

This reaction is a balanced chemical reaction because in this reaction the number of atoms of individual elements present on reactant side must be equal to the product side.

(3) The given chemical reaction is,

This reaction is an unbalanced chemical reaction because in this reaction the number of chlorine atoms are not balanced.

In order to balance the chemical equation, the coefficient '2' put before the and we get the balanced chemical equation.

The balanced chemical reaction will be,

(4) The given chemical reaction is,

This reaction is a balanced chemical reaction because in this reaction the number of atoms of individual elements present on reactant side must be equal to the product side.

(5) The given chemical reaction is,

This reaction is an unbalanced chemical reaction because in this reaction the number of iron and copper atoms are not balanced.

In order to balance the chemical equation, we are removing the coefficient '2' that present before and we get the balanced chemical equation.

The balanced chemical reaction will be,

the correct answer is:

a. formation of precipitation