Question

The volume of 2.9 g of a gas at 25ºC is the same as

the volume of 0.2 g of

H2

at 17ºC and same

pressure. What is the molecular weight of the gas?​

Answer 1

Answer:

40

Explanation:

Let M be the molar mass of the gas.

The number of moles of the gas, n=

M

2.9

.

The volume of the gas is V= PnnR .V= MP 2.9R×368

The number of moles of dihydrogen are n' = 2

0.184। =0.092

The volume of dihydrogen gas is = P

0.092×R×290

.

At same pressure P, the volume of gas is equal to volume of dihydrogen.

0.092R×290= M

2.9R×368 M= 0.092×290 2.9×368 =40

Answer 2

Answer:

40 is the correct answer