Question

If one mole of nitrogen molecules weighs 28g, calculate the mass of one molecule of nitrogen in gram

Answer 1

1mole of nitrogen molecule - 6.022* 10^23
1 mole of nitrogen molecule - 28g
so ,6.022*10^23molecules-28 gram
thus,    28/6.022*10^23-mass of one molecule
4.6*10^-23- mASS OF ONE MOLECULE OF NITROGEN

Answer 2

The mass of one molecule of nitrogen is $4.648\times 10^{-23}$ g of $N_2$.

Given:

Weight of one mole of nitrogen molecule = 28g

To find:

Mass of one molecule of nitrogen = ?

Calculation:

1 mole of nitrogen is composed of $6.02\times 10^{23}$ molecules.

∴ Weight of $6.02\times 10^{23}$ molecules of nitrogen = 28

As

Weight of $6.02\times 10^{23}$ molecules of nitrogen = 28

Weight of 1 molecule of nitrogen = X

When the above equation is cross multplied, it gives

X × $6.02\times 10^{23}$ = 28 × 1

X = $\frac{28\times 1}{6.02\times 10^{23}}$

X = $\frac{28}{6.02\times 10^{23}}$

X = $4.648\times10^{-23}$

Conclusion:

Thus the mass of one molecule of nitrogen in calculated as $4.648\times10^{-23}$ grams.

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