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25 December, 04:12

A chemist determined by measurements that. 040 moles of gold participated in a chemical reaction. calculate the mass of gold that participated in the chemical reaction. round your answer to significant digits.

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  1. 25 December, 08:03
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    no. moles = the weight / molecular mass

    for our cas the molecular mass will be = with the atomic mass

    =>

    no moles = 0,4

    atomic mass = 197 u. a. m.

    => mass of gold = 0,4 * 197 = 78,8 grs.
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