Question

22.4 litres of a gas weighs 70g at STP. Calculate the weight of the gas if it occupies a volume of 20 litres at 27°C and 700 mmHg pressure.

Answer 1

Answer:

Let us consider the problem:

PV=nRT−−−−−1

Given that:

R=0.082

P=

760

700

=0.921 atm

T=273+27=300

Put the all value in equation 1

0.921×20=n×0.082×300

n=0.748 moles

1 mole contains 70g

0.748 contains