Question

A gas occupies a volume of 140 ml at 35.0 c and 97 kpa what is the volume of gas at STP

Answer 1

We can use the combined gas law equation as the amount of gas is constant in both instances
$\frac{P1V1}{T1} = \frac{P2V2}{T2}$
P - pressure , V- volume and  T - temperature in kelvin
parameters for the first instance are on the left side and parameters at STP are on the right side of the equation 
P1 - 97 000 Pa
P2 - 101 325 Pa
T1 - 35.0 °C + 273 = 308 K
T2 - 273 K
V1 - 140 mL
V2 
substituting the values in the equation
$\frac{97000Pa*140mL}{308K} = \frac{101325Pa*V}{273K}$
V = 119 mL
volume at STP is 119 mL