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9 July, 23:47

What mass of sulfur would have precisely 4.7x10^22 atoms of sulfur?

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Answers (2)
  1. 10 July, 00:11
    0
    Answer: It would be 2.5
  2. 10 July, 00:12
    0
    2.498g

    Explanation:

    First off it's important to know Avogadro's number relationship with number of moles and molar mass.

    It is given as;

    1 mole = 6.02 * 10^23 atoms.

    A mole's weight is equal to it's molar mass. Hence the equation can be changed to;

    1 mole = molar mass = 6.02 * 10^23 atoms

    In this problem, molar mass of Sulphur is 32g/mol. This means 1 mole of sulphur weighs 32 g and contains 6.02 * 10^23 atoms. What mass of sulphur would then contain 4.7x10^22 of atoms?

    This leads us to;

    32 g = 6.02 * 10^23

    x g = 4.7x10^22

    Upon cross multiplication, we have;

    x = (4.7x10^22 * 32) / 6.02 * 10^23

    x = 24.98 * 10^-1

    x = 2.498g
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