The number of energy levels is determined by the a. groups
b. periods
c. valence electrons
d. atomic mass number

Calculate the number of molecules present in 0.750 mol of mgo.

All of the following are part of the biosphere except

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?