Question

100cm³ of Carbon (IV) Oxide diffuses through a porous plate in 30 seconds. Calculate the time taken by 75cm³ of Nitrogen (IV) Oxide to diffuse through the same plate under similar conditions. (C = 12, 0 = 16, N = 14)

Answer 1

75cm³ of CO2 takes = ^{(75 x 30)}/₁₀₀ second = 22.5 s 

Rmm of CO₂ = 12 + 2 x 16 = 44

Rmm of NO₂ = 14 + 2 x 16 = 46

 = 23.006s