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The mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.
The mass of one mole of Nitrogen gas is 28 g/mol.
The number of atoms in one mole of Nitrogen gas is 6.022 x 10²³ molecules.
The mass of Nitrogen gas in the given number of molecules is calculated as follows;
6.022 x 10²³ --------------------- 28 g/mol
3.0 x 10²³ ----------------------------- ?
[tex]= \frac{3.0 \times 10^{23} \times 28}{6.022 \times 10^{23} } \\\\= 13.95 \ g[/tex]
Thus, the mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.
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