Chemistry · The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions
The vapour density of oxygen is than air.
The vapour density of oxygen is than air.
- A. more
- B. less
- C. depends on temperature
- D. none of the above
Step-by-step solution
Vapour density is typically defined as the density of a gas relative to air (or hydrogen). The molar mass of oxygen (O₂) is 32 g/mol, while the average molar mass of air is about 29 g/mol. Under identical temperature and pressure, density is proportional to molar mass (ideal gas law), so oxygen is denser than air. Thus, the vapour density of oxygen is greater than that of air.
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