What are two factors that affect the boiling point of water

Which of these conditions most likely produces an unstable isotope?

What will most likely happen when two bromine atoms bond together?

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?