Answer:

Answer

6.022 X 1023 number of N2 molecules.

As we know that 1 mole = 6.022 X 1023atoms

For 1 mole of N2 molecules:

First, we apply the formula:

⇒ Mass of N2 = No. of moles × Molar mass of N2

⇒ Mass of N2 = 1 mole × 2(atomic mass of nitrogen)

⇒ Mass of N2 = 1mole × 28u

⇒ Mass of N2 = 28g

Thus, mass of 6.022 × 1023 number of N2 molecules is 28g.

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