The number of molecules of nitrogen, n2, found in 500.0 g of nitrogen gas is?

Question

Irvin Burgess

Chemistry

5 February, 01:46

The number of molecules of nitrogen, n2, found in 500.0 g of nitrogen gas is?

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Answers (1)

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Lawson Archer · Answer 1

The molar mass of monotonic Nitrogen is 14 g/mol. Since this is diatomic Nitrogen, double that to 28 g/mol.

Next, divide total mass by molar mass, 500 g / 28 g/mol, which gives 17.8571 moles. A mole is defined as being 6.022*10^23 molecules, so multiply moles by molecules/mol (Avogadro's number), and we finally end up with something like 1.075 * 10^25, give or take a few billion particles.