1. The problem statement, all variables and given/known data 1) Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 2.50-L metal bottle that contains air at 105K and 2.0 atm pressure is sealed off. If we inject 100.0 mL of liquid helium and allow the entire system to warm to room temperature (25 °C), what is the pressure inside the bottle? 2) A mouse is placed in a sealed chamber with air at 752.0 torr. This chamber is equipped with enough solid KOH to absorb any CO2 and H2O produced by the mouse. The gas volume in this chamber is measured to be exactly 2.30 L, and the temperature is held constant at 296K. After two hours the pressure inside the chamber falls to 723.2 torr. What mass of oxygen has the mouse consumed?