A gas cylinder holds $85$ g of a gas 'X'. The same cylinder when filled with hydrogen holds $8.5$ g of hydrogen under the same conditions of temperature and pressure.
Calculate the molecular weight of 'X'.

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Solution

Under similar conditions same volume of two gases have equal no of moles so, number of moles of X = number of moles of hydrogen
$\frac{85}{M} = \frac{8.5}{2}$
$M = 20 g m$

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A gas cylinder holds 85 g of a gas 'X'. The same cylinder when filled with hydrogen holds 8.5 g of hydrogen under the same conditions of temperature and pressure.Calculate the molecular weight of 'X'.

Under similar conditions same volume of two gases have equal no of moles so, number of moles of X = number of moles of hydrogen85M=8.52M=20 gm

A gas cylinder holds $85$ g of a gas 'X'. The same cylinder when filled with hydrogen holds $8.5$ g of hydrogen under the same conditions of temperature and pressure.
Calculate the molecular weight of 'X'.

Under similar conditions same volume of two gases have equal no of moles so, number of moles of X = number of moles of hydrogen
$\frac{85}{M} = \frac{8.5}{2}$
$M = 20 g m$