A flexible container at an initial volume of 8.15 L contains 7.51 mol of a gas. More gas is
then added to the container until it reaches a final volume of 13.9 L. Assuming the
pressure and the temperature of the gas remained constant, calculate the moles of gas
added to the container.
15.1 mol
O 5.5 mol
0 4.40 mol
12.8 mol

The answer for the following problem is mentioned below.

Explanation:

Given:

Initial moles () = 7.51 moles

Initial volume () = 8.15 L

Final volume () = 13.9 L

To find:

Final moles of the gas

We know;

From the ideal gas equation;

P × V = n × R × T

where;

P represents the pressure of the gas

V represents the volume of the gas

n represents the no of moles of the gas

R represents the universal gas constant

T represents the temperature of the gas

we know;

from the above mentioned equation,

   V ∝ n

So,

=

where,

represents the initial volume

represents the final volume

represents the initial moles

represents the final moles

So,

=

= 12.8 moles

Therefore the final moles of the gas is 12.8 moles