Question

12. Molecular mass of a gas is 78. Its density at 98°C
and 1 atm will be
(a) 200 g
(b) 2.56 g L-
(c) 256 g L-
(d) 78 g L-​

Answer 1

Answer:

2.56g L-

Explanation:

P = 1 atm

T = 98 + 273 = 371 K

M = 78 g mol-

R = .0821 g L atm K- mol-

PM = dRT

d = PM/ RT

= 1 x 78/ .0821 x 371

= 2.56g L-