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7 July, 07:43

If a sample of nitrogen gas (N2) contains 6.0 * 1024 atoms of nitrogen, then about how many moles of nitrogen gas are in the sample

3.0

1.0

5.0

2.5

+3
Answers (1)
  1. 7 July, 11:26
    0
    One mole of any substance contains Avogadro's number of atoms.

    This means that one mole of nitrogen contains 6.022 * 10^23 atoms.

    To know the number of moles containing 6 * 10^24 atoms, all you have to do is cross multiplication as follows:

    number of moles = (6*10^24 * 1) / (6.022*10^23) = 9.963 moles which is approximately 10 moles

    Since one nitrogen molecule has two nitrogen atoms, therefore, the sample has 10/2 = 5 moles of nitrogen molecules
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