Respuesta :

superman1987

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 ν is the rate of effusion and M is the atomic  or molecular weight of the gas particles.

The lighter gases move more quickly than heavier ones at the same temperature.

  • Molecular mass of (O₂) = 32 g/mol;
  • Molecular mass of (CH₄) = 16 g/mol;
  • Molecular mass of (CO₂) = 44 g/mol;
  • Molecular mass of (Cl₂) = 71 g/mol.

So, Methane has smallest molecular mass and diffuses the fastest.

CH4 is the answer.

Hope this helps <3