Under what pressure will a scientist need to store 0.400 moles of gas if the container has a volume of 200.0 mL and the temperature is kept at 23.0 C?

P*V=n*R*T where p is the pressure, v the volume in L, n the quantity in moles, R a standard number that should be given and T the temperature in Kelvin

R=8.32 (usually)

T (in K) = 273+T (in Celsius) so T=296K

P*V=n*R*T

P=n*R*T/V

P=0.4*8.32*296/0.2