If 400cm3 of oxygen is collected at a pressure of 980mmHg. What volume will the gas occupy if the pressure were changed to 940mmHg

The answer for the given problem is mentioned below.

Explanation:

Given:

Pressure of oxygen () = 980 mm of Hg

Pressure of unknown gas () = 940 mm of Hg

Volume of oxygen () = 400 cm³

To find:

Volume of unknown gas ()

We know;

According to 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

From the above equation;

   P×V = constant

    P ∝  

Therefore;

=

where;

      =

  =

  = 417 cm³

Therefore volume of the gas is 417 cm³.