Question

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

Answer 1

Answer:

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Explanation:

Number of moles (n) = Given mass (m) / Molar mass (M)

As the ratio by weight of Hydrogen and Oxygen is 1:4

Molar ratio will be = \frac{n_{H_{2}}}{n_{O_{2}}} = \frac{ \frac{1}{2} }{ \frac{4}{32} } = \frac{32}{8} = 4

The molar ratio of Hydrogen and Oxygen is 4:1

Answer 2

Answer:

Explanation: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:

Moles of O2:4/32

Moles of H2:1/2

Therefore, moles of H2/moles of O2 :

0.5 / 0.125= 0.5 x 8 = 4:1

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