<u>Answer:</u> The volume of ideal gas is 3.32 L
<u>Explanation:</u>
To calculate the volume, we use the equation given by ideal gas equation:

where,
P = pressure of the gas = 200 kPa
V = Volume of gas = ?
n = number of moles of gas = 0.200 moles
R = Gas constant = 
T = temperature of the gas = 400 K
Putting values in above equation, we get:

Hence, the volume of ideal gas is 3.32 L