Answer:
Methane(CH₄).
Explanation:
- Thomas Graham found that, at a constant temperature and pressure the rates of effusion of various gases are inversely proportional to the square root of their masses.
∨ ∝ 1/√M.
where, ∨ is the rate of diffusion of the gas.
M is the molar mass of the gas.
∨₁/∨₂ = √(M₂/M₁)
- The molar mass of different choices:
Carbon dioxide: 44.01 g/mol.
Water vapor
: 18.0 g/mol.
Ammonia (NH₃): 17.0 g/mol.
Methane(CH₄): 16.0 g.mol.
Since, methane has the lowest molar mass. So, it will diffuse faster within a system.
