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10 September, 15:00

2. What mass of solid sulfur must be used to produce 12.61 L of sulfur dioxide gas at STP in the synthesis

reaction?

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  1. 10 September, 15:29
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    The standard molar volume is 22.4 L, so 12.61 L is 12.61 / 22.4 = 0.5629 moles of SO2.

    The molar ratio of S on the reactant side to S on the product side is 1 to 1.

    (In other words, one mole of solid S atoms yields one mole of SO2 molecules)

    Thus 0.5629 moles of solid S must be used. Since the molar mass of S is 32.065 (from periodic table),

    the mass of sulfur needed is 0.5629 x 32.065 = 18.05 grams.
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