Calculate the ph of a buffer solution that contains 0. 25 m benzoic acid (c6h5co2h) and 0. 15 m sodium benzoate (c6h5coona). [ka = 6. 5 x 10-5 for benzoic acid].

Which two statements are true about a system? 1. a system is a group of objects analyzed as one unit. 2. energy that moves across system boundaries is conserved. 3. there’s only one way to define the boundaries of a system. 4. all systems are made by humans.

The authors use the word “backbone” in lines 3 and 39 to indicate that

Which set of lines provides the best textual evidence for why death ought not be proud? a)and soonest our best men with thee do go, rest of their bones and souls' delivery! b)one short sleep past we wake eternally and death shall be no more: death thou shalt die! c)death be not proud though some have call'd thee mighty and dreadful for thou art not so: d)from rest and sleep which but thy picture be 5 much pleasure then from thee much more must flow