9 A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K, at constant amount of gas and volume? OA) 0.47 atm B) 0.94 atm C) 1.5 atm D) 1.1 atm E) 2.1 atm