Question

The number of moles in 11 gm of nitrogen gas is ______.

(Atomic mass of N = 14]

Options

• 0.39

• 0.49

• 0.29

Answer 1

The number of moles in 11 gm of nitrogen gas is 0.39.

Explanation:

Nitrogen gas exists naturally as diatomic molecules (N₂), so its molar mass is twice its atomic mass (2 × 14 = 28 g/mol). The number of moles is determined by dividing the given mass by this molar mass (Moles = 11 g/28 g/mol). This calculation yields approximately 0.3928, which rounds perfectly to 0.39 moles.