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9 February, 10:43

Convert 12.0 g of CO2 (44.0 g/mol) to molecules.

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  1. 9 February, 10:44
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    Answer: 1.64 x 10^23 molecules

    Explanation:

    Amount of moles of CO2 (n) = ?

    Mass of NaOH in grams = 12.0g

    Molar mass of CO2, use the molar masses of:

    Carbon, C = 12g

    Oxygen, O = 16g;

    CO2 = 12g + (16g x 2)

    = 12g + 32g

    = 44g/mol

    Since, amount of moles = mass in grams / molar mass

    n = 12.0g / 44.0g/mol

    n = 0.2727 mole

    Now based on Avogadro's law:

    1 mole of any substance has 6.02 x 10^23 molecules

    So, 1 mole of CO2 = 6.02 x 10^23 molecules

    0.2727 moles of CO2 = Z

    To get the value of Z, cross multiply:

    (Z x 1mole) = (6.02 x 10^23 molecules x 0.2727 moles)

    Z = 1.64 x 10^23 molecules

    Thus, 12.0 g of CO2 has 1.64 x 10^23 molecules
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