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Question
A certain gas 'X' occupies a volume of 100 cm3 at S.T.P. and weighs 0.5 g. Find its relative molecular mass.
Solution
At STP 100 cm3 of gas weights = 0.5 g
1 cm3 of a gas will weigh = `0.5/100`g
∴ At STP 22400 cm3 of gas will weight = `0.5/100 xx 22400`
= 112 g
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