Question

A and B are two identical vessels. A contains 15 gm ethane at 1atm and 298k . The vessel B contain 75gm of a gas at X2 at same temperature and pressure . The vapour density of X2 is ?

Answer 1

pv =nrt here p, v and t are constant therefore n is constant now the ratio of given mass and molecular mass also will be constant
therfore
15/30 = 75/molecular mass of gas
which gives the unknown molecular mass as 150
now we know vapur density is molecular mass /2
therefore 150/2 or 75
and 75 is the answer

Answer 2

Answer:use the pic to know the answer

Explanation: