how many moles are in 7.12 x 10^21 atoms of iron?

Question

how many moles are in 7.12 x 10^21 atoms of iron?

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Đan Thu 4 years 2021-07-31T19:42:10+00:00 1 Answers 12 views 0

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  1. Giakhanh
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    2021-07-31T19:43:55+00:00
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    To Find :

    How many moles are in 7.12 \times 10^{21} atoms of iron.

    Given :

    We know, 1 mole of any element or compound contains exactly N_A ( Avogadro’s Number ) atoms/compound .

    Now, N_A = 6.022 \times 10^{23}

    So, number of moles in given number of atoms are :

    n = \dfrac{6.022 \times 10^{23}}{7.12 \times 10^{21}}\\\\n = 1.18 \times 10^{-2} \ mol

    Hence, this is the required solution.

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