Which of the following is a mechanism for an SN2 reaction? 
Definitions:
Photosystem
A complex of proteins and pigments in plants and algae that absorbs light energy and converts it into chemical energy during photosynthesis.
Chlorophyll
A green pigment found in the chloroplasts of plants, algae, and some bacteria, essential for photosynthesis as it absorbs light energy to convert carbon dioxide and water into glucose.
Mitochondrion
An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).
Chloroplast
Organelle of photosynthesis in plants and photosynthetic protists. Light-dependent reactions occur at its inner thylakoid membrane; light-independent reactions, in the stroma.
Q38: Which reagents are most likely to accomplish
Q56: Identify the electrophilic site in the following
Q58: Identify the hybridization of the middle carbon
Q64: Describe the regioselectivity and stereospecificity in the
Q70: Which of the following is the strongest
Q82: For the reaction below, which of the
Q89: For the following reaction mechanism, identify the
Q106: For the following reaction sequence, identify the
Q109: Is the following alkene E, Z, or
Q135: Which of the following is an aprotic