Flag Physical Chemistry> Vapour Density...
question mark

Vapour density of moxture of NO2 and N2O4 is 34.5, then % abundance of NO2 in mixture is ______?

a. 50%

b. 25%

c. 40%

d. 60%

Rohan Shorey , 13 Years ago
Grade 11
anser 1 Answers
Yogita Nain

Last Activity: 13 Years ago

Let total moles of mixture is 100.

 

let there be x moles of NO2 molecular mass is 46 g

 

thus there are (100-x) moles of N2O4 molecular mass is 92g .  

 

total mass of mixture =  x * 42 + (100-x) 92  

 

molecular mass of mixture  =  2 * V.D = 2* 34.5 = 69

(x*42 + (100-x)92) / 100 = 69

 

solving... x=46

percentage abundance = ( (46*42) / (46*42 + 64*92) ) *100 = 24.7 (approx 25)

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments