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21 July, 09:31

Determine the number of atoms in a sample of nickel that has a mass of 8.30 x 10-12 g.

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  1. 21 July, 10:02
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    We have 8.4 * 10^10 nickel atoms

    Explanation:

    step 1: Data given

    Mass of nickel = 8.30 * 10^-12 grams

    Number of avogadro = 6.02 * 10^22 / mol

    Atomic mass nickel = 58.69 g/mol

    Step 2: Calculate moles nickel

    Moles nickel = mass nickel / atomic mass nickel

    Moles nickel = 8.30 * 10^-12 grams / 58.69 g/mol

    Moles nickel = 1.4*10^-13 moles

    Step 3: Calculate nickel atoms

    Nickel atoms = moles nickel * number of Avogadro

    Nickel atoms = 1.4 * 10^-13 moles * 6.02 * 10^23 / mol

    Nickel atoms = 8.4 * 10^10 atoms

    We have 8.4 * 10^10 nickel atoms
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