A sample of gas, $X$, occupies $600\ \text{cm}^3$ under room conditions and has a mass of $0.700\ \text{g}$. Which gas could $X$ be? 1. carbon monoxide gas 2. ethene gas 3. nitrogen gas
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct