Question

ques:- there are 13 rows in the class from one side laughing gas(N₂ O) is passed and from another side weeping gas(C₆H₁₁OBr) is passed at which row the students will laugh and weep

Answer 1

R1/R2= m(N₂ O)/m(C₆H₁₁OBr)

Where R1= rate of diffusion of N₂ O

R2= rate of diffusion of C₆H₁₁OBr

m(N₂ O)= 44 g/mol

m(C₆H₁₁OBr)= 176 g/mol

so R1/R2= 2

R1= 2 x R2

So diffusion of gas is twice the rate of diffusion of weeping gas that’s y laughing gas pass 2 rows as weeping gas will cover only one hence the 9^th row in the class will receive both laugh and weep .