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A sample of gaseous substance weighing 0...

A sample of gaseous substance weighing 0.5 g occupies a volume of 1.12 litres under N.T.P. conditions. Calculate the molar mass of the substance.

Text Solution

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1.12 litres of gaseous substance has mass = 0.5 g
22.4 litres of gaseous substance has mass `= ((0.5g))/((1.12L))xx(22.4L)=10.0g`
Now, by definition, the molar mass of a gaseous substance is the mass of 22.4 L of its vapours under N.T.P conditions
`:.` Molar mass of the gaseous substance = 10.0 g.
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