The empirical formula for the described carbon and hydrogen gas is CH2.
The question provides the empirical formula and additional context. Let's break down why CH2 is the answer based on the given information.
- Empirical Formula: The empirical formula represents the simplest whole-number ratio of atoms in a compound.
- Carbon and Hydrogen Gas: The gas is composed of only carbon and hydrogen atoms.
- Given Information: The question states, "The empirical formula of an organic compound containing carbon and hydrogen is CH2."
- Additional context: The density context about the mass of one liter matching that of N2 (Nitrogen gas) helps to deduce its molecular weight which aids in confirming it. This is relevant for finding the molecular formula but not needed for the empirical formula.
Therefore, based directly on the provided information, the empirical formula is CH2.
