Help! Im gonna fail if i dont get the answer.

Can someone me with 1 to 4 plz. fast

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?

How many molecules are in 6.0 moles of methane