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5 September, 03:48

How many moles of helium are 8.84*10^24 atoms of He?

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  1. 5 September, 04:04
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    14.77 mol.

    Explanation:

    It is known that every 1.0 mole of compound or element contains Avogadro's number (6.022 x 10²³) of molecules or atoms.

    Using cross multiplication:

    1.0 mole of He contains → 6.022 x 10²³ atoms.

    ? mole of He contains → 8.84 x 10²⁴ atoms.

    ∴ The no. of moles of He contains (8.84 x 10²⁴ atoms) = (1.0 mol) (8.84 x 10²⁴ atoms) / (6.022 x 10²³ atoms) = 14.77 mol.
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