Question

80. A 3.00 L oxygen gas is collected over water at 27°C
when the barometric pressure is 787 Torr. If vapour
X
pressure of water is 27 Torr at 27°C, moles of 0., gas
will be
(a) 0.122 (b) 0.126 (c) 0,004 (d) 0.152​

Answer 1

Answer:

BRO A is YOUR right answer

Answer 2

Answer:

Given Volume (V)=3.00 L

Temperature(T)=27

0

C=300K

Barometric pressure=787 torr

Vapour pressure of water=27 torr

total pressure=787−27=760torr=1atm

Applying in ideal gas equation

PV=nRT

n=

RT

PV

n=

0.0821×300

1×3

=0.122