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13 November, 02:58

Determine the number of atoms in 1.70 ml of mercury. (the density of mercury is 13.5 g/ml.)

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  1. 13 November, 03:03
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    To determine the number of atoms in 1.70ml of mercury, we have to determine the moles of mercury.

    First find the mass in grams by using the formula:

    Mass = volume x density

    (1.70 mL Hg) x (13.5 g/mL) = 22.95 g Hg

    Now find number of moles;

    (22.95 g Hg) x (1 mol Hg/200.59 g/mol) = 0.1144 mol Hg

    For number of atoms multiply with Avogardro's number that is 6.023 x 10 ²³

    (0.1144 mol Hg) x (6.023 x 10 ²³ atoms/mol) = 6.89 x 10²² atoms Hg

    So, there is 6.89 x 10²² atoms of mercury are present in 1.70ml of mercury.
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