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27 May, 21:30

Determine the number of atoms in a 48.3-g sample of zinc. express your answer in zinc atoms using scientific notation.

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  1. 27 May, 21:40
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    To answer this question, you need to know the molecular weight of zinc so you can determine how many mol zinc you have. Zinc molecular weight is 65.38gram/mol. Then the calculation would be: 48.3gram / (65.38gram/mol) = 0.74 mol

    Since you are asked the amount of atom, you need to multiply the unit in mole with Avogadro number. The calculation should be: 0.74 * 6.02 * 10^23 = 4.45 * 10^23 molecules
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