A mixture of gases contains H2 and O2 gases in theratio of 1 : 4 (w/w).
What is the molar ratio of thetwo gases in the mixture ?

Dear Student !

Please find below the solution to the asked query:

As we know that, moles (n) = weight (w) / Molar mass (M)

So, if the ration of weight of H₂ and O₂ is in the ratio 1 : 4, the molar ratio of the two gases will be:

$\frac{n_{H_2}}{n_{O_2}}=\frac{{\displaystyle \raisebox{1ex}{$1 g $}\!\left/ \!\raisebox{-1ex}{$ 2 g mo{l}^{-1}$}\right.}}{{\displaystyle \raisebox{1ex}{$4 g $}\!\left/ \!\raisebox{-1ex}{$ 32 g mo{l}^{-1}$}\right.}}=\frac{1}{2}\times \frac{32}{4}=4$

Hence the molar ratio of H₂ and O₂ is 4 : 1.



Hope this information will clear your doubts about Some basic concepts of chemistry.

Best Wishes !