Naphthalene, C10H8, an ingredient in mothballs, has a molar mass of 128.18 g/mol. How many molecules of naphthalene are in a mothball that h

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Naphthalene, C10H8, an ingredient in mothballs, has a molar mass of 128.18 g/mol. How many molecules of naphthalene are in a mothball that has 6.000 g of naphthalene?

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Kiệt Gia 5 years 2021-08-02T20:29:40+00:00 1 Answers 48 views 0

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  1. Xavia
    0
    2021-08-02T20:31:34+00:00
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    Answer:

    2.83 × 10²² molecules.

    Explanation:

    Using the formula below to calculate the number of moles of Naphthalene:

    mole = mass/molar mass

    Where;

    mass = 6.00g

    Molar mass = 128.18 g/mol

    mole = 6/128.18

    mole = 0.047mol

    To calculate the number of molecules of naphthalene in the mothballs, we multiply the number of moles (n) by Avagadro’s number i.e.

    number of molecule = n × 6.02 × 10^23

    number of molecules = 0.047 × 6.02 × 10^23

    = 0.283 × 10²³

    = 2.83 × 10²² molecules.

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