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17 January, 05:33

A large weather balloon filled with helium has a volume of 7.00 x 102 L at STP. Which expression should be used to find the mass of helium in the balloon?

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  1. 17 January, 08:40
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    mass of Helium = mole of Helium x Molarmass of Helium

    Explanation:

    Mole of Helium = volume of Helium / 22.4dm^3/mol

    = 7.00 x 10^2/22.4

    = 31.25mol

    Mass of Helium = mole of Helium x Molarmass of Helium

    = 31.25mol x 4g/mol

    = 125g
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