Michelle and john are walking down the street deep in conversation

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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?

What is the percent by mass of oxygen in fe2o3