A helium balloon with an internal pressure of 1.25 atm and a volume of 3.50 L at 25.00 C is released. What volume will the balloon occupy at an altitude where the pressure is
0.800 atm and the temperature is -30.00 C?

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?