9. A 1.75 L container filled with CO2 gas at 25℃and 225 kPa pressure springs aleak. When the container is re-sealed, the pressure is 200 kPA and thetemperature is 10℃. How many moles of gas were lost?
(A)0.0101 mol
(B)0.149 mol
(C)6.71 mol
(D)99.0 mol