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29 May, 13:11

Calculate the number of atoms in a 7.45x10^3 g sample of sodium

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  1. 29 May, 15:21
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    The molecular mass of sodium = 23g

    One mole of sodium consists of 23 g of sodium

    One mole consists of 1 Avagadro (6.022 x 10^23 molecules) number of molecules

    Therefore 23 g consists of 6.022 x 10^23 molecules of Sodium.

    Hence 7.45 x 10^3 g of Sodium will consist of x no of molecules of sodium.

    x no of molecules =

    (7.45 x 10^3 g/23 g) x (6.022 x 10^23)

    =1950.6 x 10^ 23 molecules (atoms).
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