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27 April, 04:19

How many atoms are there in 0.32g of copper

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  1. 27 April, 04:45
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    The number of atoms that are in 0.32 g of copper are

    3.01 x10^21 atoms

    calculation

    Step 1: find the number of moles of Copper

    moles = mass/molar mass

    = 0.32 g / 63.5 g/mol=0.005 moles

    Step 2: use the Avogadro's constant to determine the number of atom

    in 0.005 moles of Cu

    that is according to Avogadro's law 1 mole = 6.02 x10^23 atoms

    0.005 moles=? atoms

    by cross multiplication

    = (0.005 moles x 6.02 x10^23 atoms) / 1 mole = 3.01 x10 ^21 atoms
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