What are the four largest sources of fresh water on earth?

What shape would a molecule with two bound groups and two lone pairs have?

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?

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp