Question

Consider the balanced equation

Answer 1

Answer : The mole ratio of $NH_3$ to $N_2$ is, 4 : 2

Explanation :

Mole ratio : It is defined as the ratio of number of moles of the substances whose ratio is to be calculated.

The given balanced chemical reaction is :

$4NH_3+3O_2\rightarrow 2N_2+6H_2O$

By stoichiometry of the reaction we can say that,

4 moles of ammonia reacts with the 3 moles of oxygen to produce 2 moles of nitrogen and 6 moles of water.

Hence, the mole ratio of $NH_3$ to $N_2$ is, 4 : 2

Answer 2

4:2. You are comparing the coefficients of NH3 and N2