Andrew is single and claims zero allowances. He gets a big refund each year. With weekly earnings of $400\

$$, how much less would be withheld for federal and state taxes if he increased his allowances to two?$$

Conduct online research about unions and professional organizations in two other countries (one of which should be in Europe) . How do working conditions in these other countries compare with those in the United States?

What is the main function of unions?

List benefits provided to most full -time, permanent employees.

What is the gross pay for an hourly employee who earns $12\$$ an hour and worked$56$ hours last week?

What is semantic memory?

Match the terms with the definitions . Some terms may not be used.

___Time worked beyond regular work hours

a. benefits

b. bonus

c. gross pay

d. incentive pay

e. net pay

f. overtime

g. profit sharing

h. salary

i. vested

j. wage

Match the terms w ith the definitions . Some terms may not be used.

___A work schedule that allows employees to choose their working hours within a defined time limit

a. bargaining

b. compressed workweek

c. flextime

d. job rotation

e. job sharing

f. lobbying

g. seniority

h. telecom muting

i. union

What is an "intensive outpatient program" for mental health?

A teen had a long bike ride coming up the next day, so he decided to get ready by eating a big steak the night before. Explain your opinion of his decision.

Oxidation of gaseous $\mathrm{ClF}$ by $\mathrm{F}_2$ yields liquid $\mathrm{ClF}_3$, an important fluorinating agent. Use the following thermochemical equations to calculate $\Delta H_{\mathrm{rxn}}^{\circ}$ for the production of $\mathrm{ClF}_3$ :
(1) $2 \mathrm{CIF}(g)+\mathrm{O}_2(g) \longrightarrow \mathrm{Cl}_2 \mathrm{O}(g)+\mathrm{OF}_2(g) \quad \Delta H^{\circ}=167.5 \mathrm{~kJ}$
(2) $2 \mathrm{~F}_2(g)+\mathrm{O}_2(g) \longrightarrow 2 \mathrm{OF}_2(g) \quad \Delta H^{\circ}=-43.5 \mathrm{~kJ}$
(3) $2 \mathrm{ClF}_3(l)+2 \mathrm{O}_2(g) \longrightarrow \mathrm{Cl}_2 \mathrm{O}(g)+3 \mathrm{OF}_2(g)$

A proposed mechanism for the oxidation of nitric oxide to nitrogen dioxide was described in Problem 12.21. Another possible mechanism for this reaction is

$$\begin{aligned} &2 \mathrm{NO}(g) \underset{k_1}{\stackrel{\mathrm{k}_4}{\rightleftharpoons}} \mathrm{N}_2 \mathrm{O}_2(g) \quad \text { Faster, reversible } \\ &\mathrm{N}_2 \mathrm{O}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \stackrel{\mathrm{k}}{\longrightarrow} 2 \mathrm{NO}_2(\mathrm{~g}) \quad \text { Slower, rate-determining } \\ & \end{aligned}$$

(a) Write a belanced equation for the overall reaction. (b) Show that this mechanism is consistent with the experimental rate law, rate $=-\Delta[\mathrm{NO}] / \Delta t=k[\mathrm{NO}]^2\left[\mathrm{O}_2\right]$. (c) Relate the rate constant $k$ to the rate constants for the elementary reactions.

Graph the function $f(x)=x \cot x$ using a graphing utility. (Experiment with your choice of a graphing window.) Use your graph to determine the limit. $\lim _{x \rightarrow-\pi^{-}} f(x)$

One model for the growth of the value of stock in a corporation assumes that the stock has a limiting “market value” L, and that the value v(t) of the stock on day t satisfies the differential equation $v^{\prime}=a(L-v)$ for some constant a. Find a formula for the value v(t) of a stock whose market value is L = 40 if on day t = 10 it was selling for v = 30.