Question

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Answer 1

Answer:

a) CO

Explanation:

Molar mass of N2 = 2 x 14 = 28  g mol -1 (grams per mole)

1 mole (6.02 × $10^{23}$ particles) of any gas will occupy a volume of 22.4 dm3, as long as temperature and pressure are kept constant. So the number of moles of N2 and Xmust be equal for them to occupy the same volume.

Out of the 4 options, which one has the same molar mass as N2?

a) CO = 12 + 16 = 28 g mol -1

b) CO2 = 12 + (16 x 2) = 44  g mol -1

c) H2 = 1 x 2 = 2  g mol -1

d) NO = 14 + 16 = 30  g mol -1

Therefore the answer is a) CO