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9 March, 13:39

A sample of gaseous methyl ether has a mass of 8.12g and occupies a volume of 3.96L at STP. What is the molecular weight of methyl ether?

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  1. 9 March, 14:04
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    Molar volume is when 1 mol of any gas occupies 22.4 L at STP.

    Methyl ether has a mass of 8.12 g,

    Volume occupied - 3.96 L

    If 22.4 L occupied by 1 mol of gas

    Then 3.96 L occupied by 1/22.4 x 3.96 = 0.176 mol of gas

    The mass of 0.176 mol = 8.12 g

    Molar mass is mass of 1 mol

    Therefore mass of 1 mol = 8.12/0.176 = 46.1

    Molecular weight is 46.1 g/mol
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