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23 January, 19:45

Calculate the number of LiLi atoms in 8.9 molmolof Li.

Express your answer using two significant figures.

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  1. 23 January, 21:37
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    5.35*10²⁴ atoms of Li

    Explanation:

    To solve this we apply this rule of three:

    We know that 1 mol contains 6.02*10²³ atoms

    Therefore, 8.9 moles must contain (8.9. 6.02*10²³) / 1 = 5.35*10²⁴ atoms

    One mol is the amount of substance containing as many elemental entities as atoms, which are contained in 12 g of the C¹² isotope

    In conclussion 6.02*10²³ atoms of C¹² isotope weighs 12 g
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