[单选题]
09.15: An ideal gas in a closed coo(h +a pvhn4-nntainer of voluz anri3o-iqo mbgf,0tk)/u27v p ;x 6fme 6.0 L is at a temperature of izfr72vnqt u3o/px -bf)ioa,; m0g6k $100^{\circ}C$. If the pressure of the gas is 2.5 atm, how many moles of gas are in the container?