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11 May, 17:32

How many moles represent 2,05 x 1024 molecules of ammonia (NH) ?

-2.2

-12.2

-3

-3.4

+3
Answers (1)
  1. 11 May, 20:08
    0
    option D is Correct : 3.4 mole

    Explanation:

    Data Given:

    molecules of ammonia (NH₃) = 2.05 x 10²⁴

    number of moles = ?

    Solution:

    Formula used to find the number of atoms

    no. of moles = number of molecules / Avogadro's number

    Where

    Avogadro's number = 6.022 x 10²³

    now, formula will be

    no. of moles = number of molecules / 6.022 x 10²³

    So,

    we have to find number of moles

    Now put the values in above equation

    no. of moles = 2.05 x 10²⁴ / 6.022 x 10²³

    number of moles = 3.4 mol

    option D is Correct : 3.4 mole
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