A 0.905 mol sample of Ar gas is confined in a 22.6 liter container at 31.6 °C.
 
If the volume of the gas sample is increased to 45.2 L holding the temperature constant, the average force per molecule-wall collision will-
 
1) increase.
 
2) not enough information to answer the         question.
 
3) remain the same.
 
4) decrease.