Question

Consider the balanced equation

4NH3 + 3O2 --> 2N2 + 6H2O What is the mole ratio of NH3 to N2?

2:4

4:2

4:4

7:2

Answer 1

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

Answer 2

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