The mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.
<h3>Mass of the Nitrogen gas</h3>
The mass of one mole of Nitrogen gas is 28 g/mol.
<h3>Number of atoms </h3>
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 ----------------------------- ?
Thus, the mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.
Learn more about mass of gas molecules here: brainly.com/question/11641158