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8 November, 23:15

Calculate the mass of 2.00 X 1020 molecules of SO3.

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  1. 9 November, 03:03
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    0.027g

    Explanation:

    From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules.

    From the above, it means that 1mole of SO3 also contains 6.02x10^23 molecules.

    1mole of SO3 = 32 + (16x3) = 32 + 48 = 80g

    If 1 mole (80g) of SO3 contains 6.02x10^23 molecules,

    Then Xg of SO3 will contain 2x10^20 molecules i. e

    Xg of SO3 = (80x2x10^20) / 6.02x10^23 = 0.027g
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