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11 November, 12:14

A gaseous compound composed of sulfur and oxygen, which is linked to the formation of acid rain, has a density of 3.58 g/L at STP. What is the molar mass of this gas?

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  1. 11 November, 15:05
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    For any gas at STP : p = 1 atm and T = 273 K and R = 0.08206 (standard)

    density = molar mass x p / RT

    3.58 = molar mass x 1 atm / 0.08206 x 273

    molar mass = 80.2 g/mol (SO3)
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