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If 30cm³ of oxygen diffuses through porous plug i...

If 30cm³ of oxygen diffuses through porous plug in 7s, how long will it take 60 cm³ of chlorine to diffuse through the same plug?

A.

12s

B.

14s

C.

21s

D.

30s

View answer & explanation

Correct answer is C

(R)_o/(R)_a √(M)_a/(M_O (30/7)/(60/t) = √ (35.5)/(16)
(60/t) (30/7)/ √(35.5)/(16) t = (60/30)/(7) x (4)√35.5
t = (60 x 7 x √35.5)/(30 x 4) = 21s

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