[单选题]
09.15: An ideal gas in )c/8q-jxclty2o 3gz iubwq/ +a closed container of volume 6.0 L is at a temperature on 3nhf enw6ta7*3v 5pjf 6n35 vf3newah7 jp*tn $100^{\circ}C$. If the pressure of the gas is 2.5 atm, how many moles of gas are in the container?