How many moles are in 7.12 x 1021 atoms of iron?

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How many moles are in 7.12 x 1021 atoms of iron?

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Khoii Minh 3 years 2021-08-01T18:20:55+00:00 1 Answers 8 views 0

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  1. mit
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    2021-08-01T18:22:51+00:00
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    Answer:

    0.0118mol

    Explanation:

    To obtain the number of moles (n) in the given number of molecules of iron, we divide by Avagadro’s number (6.02 × 10²³).

    That is; n = number of molecules ÷ nA

    According to this question, there are 7.12 x 1021 atoms of Iron (Fe).

    n = 7.12 x 10²¹ ÷ 6.02 × 10²³

    n = 7.12/6.02 × 10^ (21 – 23)

    n = 1.183 × 10^-2

    n = 0.0118mol

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