The mass of 0.5 mole of N₂ gas is
[amp_mcq option1=”7 g” option2=”14 g” option3=”21 g” option4=”28 g” correct=”option2″]
This question was previously asked in
UPSC NDA-2 – 2024
Nitrogen gas is diatomic, represented as N₂. The atomic mass of Nitrogen (N) is approximately 14 g/mol. Therefore, the molar mass of N₂ gas is 2 × 14 g/mol = 28 g/mol.
Given the number of moles is 0.5 mole, the mass of 0.5 mole of N₂ gas is 0.5 mol × 28 g/mol = 14 g.