Can someone help me with these two questions

Geothermal energy for industrial use is available almost anywhere. a.true b.false

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

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?