Predict whether the following reactions would occur spontaneously in aqueous solution at $25^{\circ} \mathrm{C}$. Assume that the initial concentrations of dissolved species are all 1.0 M. (a) $\mathrm{Ca}(s)+\mathrm{Cd}^{2+}(a q) \longrightarrow \mathrm{Ca}^{2+}(a q)+\mathrm{Cd}(s)$ (b) $2 \mathrm{Br}^{-}(a q)+\mathrm{Sn}^{2+}(a q) \longrightarrow \mathrm{Br}_2(l)+\mathrm{Sn}(s)$ (c) $2 \mathrm{Ag}(s)+\mathrm{Ni}^{2+}(a q) \longrightarrow 2 \mathrm{Ag}^{+}(a q)+\mathrm{Ni}(s)$ (d) $\mathrm{Cu}^{+}(a q)+\mathrm{Fe}^{3+}(a q) \longrightarrow\mathrm{Cu}^{2+}(a q)+\mathrm{Fe}^{2+}(a q)$

Predict whether the following reactions would occur spontaneously in aqueous solution at $25^{\circ} \mathrm{C}$. Assume that the initial concentrations of dissolved species are all $1.0 \mathrm{M}$.

(a) $\mathrm{Ca}(s)+\mathrm{Cd}^{2+}(a q) \longrightarrow \mathrm{Ca}^{2+}(a q)+\mathrm{Cd}(s)$

(b) $2 \mathrm{Br}^{-}(a q)+\mathrm{Sn}^{2+}(a q) \longrightarrow \mathrm{Br}_2(l)+\mathrm{Sn}(s)$

(c) $2 \mathrm{Ag}(s)+\mathrm{Ni}^{2+}(a q) \longrightarrow 2 \mathrm{Ag}^{+}(a q)+\mathrm{Ni}(s)$

(d) $\mathrm{Cu}^{+}(a q)+\mathrm{Fe}^{3+}(a q) \longrightarrow \mathrm{Cu}^{2+}(a q)+\mathrm{Fe}^{2+}(a q)$

On April 2, 2010, Montana Mining Co. pays $3,721,000 for an ore deposit containing 1,525,000 tons. The company installs machinery in the mine costing$213,500, with an estimated seven-year life and no salvage value. The machinery will be abandoned when the ore is completely mined. Montana began mining on May 1, 2010, and mined and sold 166,200 tons of ore during the remaining eight months of 2010. Prepare the December 31, 2010, entries to record both the ore deposit depletion and the mining machinery depreciation. Mining machinery depreciation should be figured using the units of production method.

How much should you deposit at the end of each month in an IRA that pays $6.25\%$ compounded monthly to have $\$1,500,000$ when you retire in $40$ years? How much of the $\$1.5$ million comes from interest?

A deposit of 8000 dollars is made in an account that earns 5 precents interest compounded quarterly. The balance in the account after $n$ quarters is

$$A_n=8000(1.0125)^n, \quad n=1,2,3, \ldots$$

Compute the first eight terms of the sequence $\left\{A_n\right\}$.

A deposit of $1000 at 5$V(t)=1000 e^{0.05 t}$ dollars after t years. Find the average value during the first 40 years (that is, from time 0 to time 40).

Respond to the following questions in French using the number at the end of each sentence to complete your answer. Use pronouns, write out the numbers, and use the correct form of avoir, in your responses.

Tu as un CD? (28) $\rule{1cm}{1pt}$ $\rule{1cm}{1pt}$

Voici les reponses. Invent questions for the answers.

MODELES: $\quad$ Dans la chambre de Claire. $\longrightarrow$

Ou est-ce qu'il y a des affiches de cinema?

Ou sont les CD d'Aimee?

Vingt-quatre etudiants.

Voici les reponses. Invent questions for the answers.

MODELES: $\quad$ Dans la chambre de Claire. $\longrightarrow$

Ou est-ce qu'il y a des affiches de cinema?

Ou sont les CD d'Aimee?

Parce que je n'ai pas envie d'etudier.

(a) Compute the voltage at 25 degree C of an electrochemical cell consisting of pure cadmium immersed in a $2 \times 10^{-3} \mathrm{M}$ solution of $\mathrm{Cd}^{2+}$ ions, and pure iron in a $0.4 \mathrm{M}$ solution of $\mathrm{Fe}^{2+}$ ions.

(b) Write the spontaneous electrochemical reaction.

Identify each sentence by writing CX for complex or CD-CX for compound-complex on the line provided.

$\underline{\hspace{1cm}}$ Although I can't and don't want to skate, I have learned a lot from Kiesha's story, and I will pursue my own dream.

If you deposit $\$ 250$ in an account with an APR of $6 \%$ and continuous compounding, the balance after $2$ years is a. $\$ 250 \times e^{0.12}$ b. $\$ 250 \times e^2$ c. $\$ 250 \times(1+0.06)^2$

Use the following information. You want to have $\$ 2500$ after 2 years. Find the amount you should deposit for each of the situations described below.

The account pays 5% annual interest compounded yearly.

A certain atom has a [noble gas] $5 s^2 4 d^{10} 5 p^4$ electron configuration. Which element is it?

(a) $\mathrm{Cd}$ (b) $\mathrm{Te}$ (c) $\mathrm{Sm}$ (d) $\mathrm{Hg}$ (e) More information is needed