Agas diffuses 1/8 times faster than hydrogen gas. what is the molar mass of the gas?
129.02 g/mol
136.44 g/mol
140.81 g/mol
145.45 g/mol

129.02 g/mol.

Explanation:

∨ ∝ 1/√M.

where, ∨ is the rate of diffusion of the gas.

M is the molar mass of the gas.

∵ ∨₁/∨₂ = √(M₂/M₁).

∨₁ is the rate of effusion of H₂ gas.

∨₂ is the rate of effusion of the unknown gas.

M₁ is the molar mass of H₂ gas (M₁ = 2.016 g/mol).

M₂ is the molar mass of the unknown gas (M₂ = ??? g/mol).

∨₂ = 1/8∨₁

∨₁/∨₂ = 8.0.

∵ ∨₁/∨₂ = √(M₂/M₁)

∴ (8.0) =√(M₂)/(2.016 g/mol)

∴ (8.0)² = (M₂)/(2.016 g/mol)

∴ M₂ = (8.0)²(2.016 g/mol) = 129.024 g/mol ≅ 129.02 g/mol.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: