An oxygen bubble at the bottom of a lake 20. m deep has a volume of 1.20 cm^3. The temperature at the bottom is 5.0 degrees C and the temperature at the top is 16.0 degrees C, just before the bubble breaks the surface of the water. Calculate:
a) the initial pressure inside the bubble at the bottom of the lake
b) final volume of the bubble, just before it breaks
c) the number of oxygen molecules in the bubble
d) the rms velocity of the oxygen molecules in the bubble at the bottom of the lake