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Calculate the volume in litres of 20 g of hydrogen gas at step .

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Calculate the volume in litres of 20 g of hydrogen gas at step .
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Number of moles of hydrogen = `("mass of hydrogen")/("molecular mass of hydrogen in grams") = (20 g)/(2g) = 10` .
`therefore` volume of hydrogen = number of moles `xx` standard molecular volume
`= 10 xx 22.4 = 224` litres .
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