Chronic Tectonics - Please Help

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

What is the molar mass of potassium nitrate, kno3

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?