Question

What will be the volume of 15g oxygen at 25 degree celsius and 650 mmhg pressure?

Answer 1

Explanation:

Solution:-

Mass of O

2

=3.5g

Molar mass of O

2

=32g

∴ No. of moles of O

2

,(n)=

32

3.5

=0.109 mol

Given that:-

Pressure, (P)=740 mm of Hg=0.97atm

Temperature, (T)=27℃=(27+273)=300K

R=0.0821 L atm K

−1

mol

−1

Now from ideal gas law,

PV=nRT

⇒V=

P

nRT

⇒V=

0.97

0.109×0.0821×300

=2.76L

Hence the required answer is 2.76L