Question

N2(g)+3H2(g)=2NH2(g) What is the ratio in their volumes under similar conditions of temperature and pressure?​

Answer 1

Answer 1:3:2

Explanation:

By avagrado's law, the volume of gas in a reaction is proportional to the number of moles. since we know that the number of moles=$\frac{volume}{molar volume (24dm^{3} )}$

hence for N2 the volume of the gas would be 24dm^3 as there is only  one mole. for 3H2 it would be 72 dm^3 as 3 moles of H2 are present hence 24x3=72. Lastly for 2NH2 , the volume would be 48dm^3 as two moles are produced, hence 2x24=48. Having all the values we can place it in a ration of

24:72:48 (respectively placed via the chronological appearance of the eqn of N2 first,followed by 3H2 and then 2NH2)

We simply the ratio by  dividing  by 24 a and we will get :

1:3:2