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28 October, 22:01

A chemist determines by measurements that 0.0200 moles of iodine solid participate in a chemical reaction. Calculate the mass of iodine solid that participates. Round your answer to 3 significant digits. $ x 6?

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  1. 29 October, 01:27
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    The answer is 5.076 g of iodine solid.

    Explanation:

    The molecular formula of iodine is I₂.

    Molecular weight of I₂ = molecular mass of I x 2 = 126.904 / mol x 2 = 253.808 g/mol

    Thus, to calculate the mass of I₂ there is in a mol, we have to multiply the amount of mol of I₂ by its molecular weight as follows:

    0.0200 mol I₂ x 253.808 g/mol I₂ = 5.07616 g

    The mass rounded to 3 significant digits is 5.076 g
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