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24 January, 10:45

Calculate the number of atoms in. (a) 52 moles of He. (b) 52 g of He. (c) 52 u of He

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  1. 24 January, 11:09
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    Atomic mass of Helium is 4u = 2protons + 2 Neutrons = 1 atom

    No. of atoms in 52u = 52/4 = 13 atoms

    52g of heliume

    6.022*10^23*52/4 atoms of he

    7.829*10^24 atoms of he

    1mole of he = 6.023*1023
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