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Standard X

Chemistry

Relative Molecular Mass

A gas cylinde...

Question

A gas cylinder of capacity of 20 dm³ is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is:

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Solution

The correct option is B
10

Vapour density of gas = Mass of gas/Mass of an equal volume of hydrogen at the same temp. and press

= 10/2 = 5

Relative Molecular mass = 2 x Vapour density

= 2 x 5

= 10

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Q. A steel cylinder of 8 litres capacity contains hydrogen gas at 12 atm pressure. At the same temperature, how many cycle tubes of 4 litres capacity at 2 atm can be filled up with this gas?

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A gas cylinder of capacity of 20 dm3 is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is:

The correct option is B 10Vapour density of gas = Mass of gas/Mass of an equal volume of hydrogen at the same temp. and press = 10/2 = 5 Relative Molecular mass = 2 x Vapour density = 2 x 5 = 10

A gas cylinder of capacity of 20 dm³ is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is:

The correct option is B
10

Vapour density of gas = Mass of gas/Mass of an equal volume of hydrogen at the same temp. and press

= 10/2 = 5

Relative Molecular mass = 2 x Vapour density

= 2 x 5

= 10