Question

7 Calculate the mass of 3.0118 1024 molecules of Nitrogen gas ​

Answer 1

Answer:

First of all we should find out the mass of 1 mole of nitrogen molecules (N2). Now,

1 mole of N2 = Molecular mass of N2 in grams

= Mass of 2 N atoms in grams

=2×14

=28 grams

Thus, the mass of 1 mole of nitrogen molecules is 28 grams. Now, 1 mole of nitrogen molecules contains 6.022×1023 molecules. This mass of 3.011×1024 molecules of nitrogen is 140 grams

Explanation:

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