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18 September, 20:44

The mass of a single molybdenum atom is 1.59*10⁻²² g. Suppose enough Mo atoms were lined up like beads on a string to span a distance of 33.4 cm (13 inches). How many atoms would be required?

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  1. 18 September, 23:23
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    7.99 * 10⁸ atoms

    Explanation:

    The diameter of Molybdenum atom is 418pm = 0.000000000418m

    therefore to determine number of Mo Atoms that'll be required =

    0.334 : 0.000000000418 = 7.99 * 10⁸ atoms

    Mass of one Mo atom = 1.59*10⁻²² g

    Mass of 7.99 * 10⁸ atoms that'll be required = 1.59*10⁻²² * 7.99 * 10⁸ =

    12.7041 * 10⁻¹³g.
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