Question: 10 dm³ of N₂ gas and 10 dm³ of gas X at the same temperature contain the same number of molecules. The gas X is
(a) CO
(b) CO₂
(c) H₂
(d) NO
Correct Answer: (a) CO
10 dm³ of N₂ gas and 10 dm³ of gas X at the same temperature contain the same number of molecules. The gas X is