Which set of reagents and conditions would most directly prepare ethyl acetate via an $S_{\mathrm{N}}2$ reaction?

Which of the following sets of conditions would most favor a successful $S_{\mathrm{N}}2$ reaction for a primary alkyl halide?

Given the following reaction: ${\mathrm{CH}}_3\mathrm{Br}$ + $\mathrm{OH}-$ → ?, predict the major product of this $S{N}_2$ reaction.

Given the following alkyl halides: 1. $\mathrm{CH}{3}_{\mathrm{Br}}$ (methyl bromide), 2. $\mathrm{CH}{3}_{\mathrm{CH}}{2}_{\mathrm{Br}}$ (ethyl bromide), 3. $\left(\mathrm{CH}{3}_2\right)\mathrm{CHBr}$ (isopropyl bromide), 4. $\left(\mathrm{CH}{3}_3\right)\mathrm{CBr}$ (tert-butyl bromide), rank them from most to least reactive in an $S{N}_2$ reaction.

Arrange the following compounds in order from fastest to slowest $S_{\mathrm{N}}2$ reaction rate when reacting with ${\mathrm{Br}}_{-}$ as the nucleophile: 1-bromopropane, 2-bromopropane, 2-bromo-2-methylpropane.

Predict the product of the following reaction.

Predict the product of the following reaction: