The addition of water to alkene $X$ gives an alcohol $Y$. Oxidation of Y produces 3,3-dimethyl-2-pentanone. Identify $X$ and $Y$, and write equations for the two reactions.

How might the following compounds be prepared using Michael reactions? Show the nucleophilic donor and the electrophilic acceptor in each case.

The following thermal rearrangement involves two pericyclic reactions in sequence. Identify them, and propose a mechanism to account for the observed result.

A $100.0 \mathrm{~mL}$ solution containing aqueous $\mathrm{HCl}$ and $\mathrm{HBr}$ was titrated with $0.1235 \mathrm{M} \mathrm{NaOH}$. The volume of base required to neutralize the acid was $47.14 \mathrm{~mL}$. Aqueous $\mathrm{AgNO}_3$ was then added to precipitate the $\mathrm{Cl}^{-}$and $\mathrm{Br}^{-}$ions as $\mathrm{AgCl}$ and $\mathrm{AgBr}$. The mass of the silver halides obtained was $0.9974 \mathrm{~g}$. What are the molarities of the $\mathrm{HCl}$ and $\mathrm{HBr}$ in the original solution?

Write balanced chemical equations for these decomposition reactions. Silver carbonate decomposes into silver oxide and carbon dioxide when it is heated.

Balance the following half-reactions, which take place in acidic solution.

b. $\mathrm{NO}_3{}^-(aq) \rightarrow \mathrm{NO}_2(g)$

Write equations for the reactions of cis-2-butene with the following reagents, representing the reactants and products using structural formulas.
$\mathrm{HBr}$

A compound X undergoes two simultaneous firstorder reactions as follows: $\mathrm{X} \longrightarrow \mathrm{Y}$ with rate constant $k_1$ and $\mathrm{X} \longrightarrow \mathrm{Z}$ with rate constant $k_2$. The ratio of $k_1 / k_2$ at $40^{\circ} \mathrm{C}$ is $8.0$. What is the ratio at $300^{\circ} \mathrm{C}$ ? Assume that the frequency factor of the two reactions is the same.

The following reactions or decays involve one or more neutrinos. Supply the missing neutrinos. (c) $?+\mathrm{P} \rightarrow \mathrm{n}+\mathrm{e}^{+}$

The set of reactions of an organism to changes in its internal condition or external environment is called a. behavior. b. learning. c. conditioning. d. stimuli.

The following reactions or decays involve one or more neutrinos. Supply the missing neutrinos. (d) ? $+\mathrm{n} \rightarrow \mathrm{P}+\mathrm{e}^{-}$

Write equations for reactions that could be used to release each of the following elements from their compounds.
(a) $O_2$ (b) $H_2$ (c) $Cl_2$

Describe what is happening in terms of bonds breaking and forming in the cold pack reactions and explain why this results in the pack feeling cold: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Write balanced equations for the following chemical reactions. Aluminum hydroxide and hydrogen sulfide form when aluminum sulfide reacts with water.