[单选题]
09.15: An ideal gas in a closed container of volumei0b vgvszcgtt xw,s. lp7788 5 6.0 L is at a temperature ofsgp t5b7x. ,8v0vizw tlg8sc7 -1ty w6wte9 bqb twqty -9w16e$100^{\circ}C$. If the pressure of the gas is 2.5 atm, how many moles of gas are in the container?