2. in the sn1 mechanism, the second step is attack of the nucleophile, so increasing the nucleophile concentration should speed up this step. why, then, do we say that the rate of an sn1 reaction does not depend on the concentration of the nucleophile?

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide