Question

if 1 mole of nitrogen molecules weighs 28 g , calculate the mass of one molecule of nitrogen in grams........

Answer 1

According to the Avogadro gas law, one mol of gas contains 6.022 *10^23 molecules under the standard temperature and pressure.

 One mole of nitrogen contains 28 gram.

 In short 28 grams contains 6.022*10^23 molecules, therefore mass of one molecule contains (28/6.022)*10^23 = 4.6*10^ (-23) g.

Answer 2

mass of 6.022*1023molecules=28g

mass of one molecule=?

28/6.022*1023

=4.64*6.022*10^23g

=27.94208*10^23g

hope it helps to you.