The temperature of a sample of liquid water changes from 50°c to 30°c. which statement best explains the change that must happen at the molecular level?
the molecules move more quickly and their average kinetic energy increases.
the molecules move more slowly and their average kinetic energy decreases.
the molecules move more quickly and their average kinetic energy decreases.
the molecules move more slowly and their average kinetic energy increases.

Amines are good nucleophiles, even though they are neutral molecules. how would the rate of an sn2 reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? amines are good nucleophiles, even though they are neutral molecules. how would the rate of an reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? because both reactants in the rate-limiting step are neutral, the reaction will be faster if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will be slower if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will occur at the same rate if the polarity of the solvent is increased. request answer