Find the reciprocal of the number.

-1/5

Check Your Understanding Which of the following compounds would be soluble in water at room temperature?

(a) $\mathrm{NH}_4 \mathrm{Cl}$,

(b) $\mathrm{KOH}$,

(c) $\mathrm{Ca}\left(\mathrm{CH}_3 \mathrm{COO}\right)_2$,

(d) $\mathrm{Ba}_3\left(\mathrm{PO}_4\right)_2$

Find the reciprocal.

$$3 \frac{1}{2}$$

What is the rationale for using drugs such as B2 agonists, acetylcholine antagonists, leukotriene inhibitors, corticosteroids, and mast cell stabilizers to manage obstructive pulmonary disorders?

Given the following thermochemical equations,

$$\begin{array}{cc} \mathrm{CaO}(s)+\mathrm{Cl}_2(g) \longrightarrow \mathrm{CaOCl}_2(s) & \Delta H^{\circ}=-110.9 \mathrm{~kJ} \\ \mathrm{H}_2 \mathrm{O}(l)+\mathrm{CaOCl}_2(s)+2 \mathrm{NaBr}(s) \longrightarrow & 2 \mathrm{NaCl}(s)+\mathrm{Ca}(\mathrm{OH})_2(s)+\mathrm{Br}_2(l) \\ \Delta H^{\circ}=-60.2 \mathrm{~kJ} \\ \mathrm{Ca}(\mathrm{OH})_2(s) \longrightarrow H^{\circ}=+65.1 \mathrm{~kJ} \end{array}$$

calculate the value of $\Delta H^{\circ}$ (in kilojoules) for the reaction

$$\frac{1}{2} \mathrm{Cl}_2(g)+\mathrm{NaBr}(s) \longrightarrow \mathrm{NaCl}(s)+\frac{1}{2} \mathrm{Br}_2(l)$$

Find the reciprocal.

1

Calculate.

$$\int_0^{\pi / 2} \int_0^{3 \sin \theta} r^2 d r d \theta$$

Write and balance a chemical equation showing the single-displacement reaction that occurs when solid barium is combined with each of the following: (a) $\mathrm{Ca}(\mathrm{CN})_2(a q)$ (c) $\mathrm{Ni}\left(\mathrm{C}_2 \mathrm{H}_3 \mathrm{O}_2\right)_2(a q)$ (b) $\mathrm{AgClO}_3(a q)$

What impact do agreements such as NAFTA have on the free enterprise system in the United States? What are the pros and cons of US participation in free trade treaties?

Write the key term that best matches each description. Refer to the Terms to Know in the Summary & Study Guide on page 551.

doing business on the Internet

Choose the correct answer.

Please let employees know if you would like them to dress (a) nicer, (b) more nicely for business meetings.

Today is the first day of school and you are getting to know your teacher and classmates. Choose the phrase that you would use in each situation.

a. Comment ca va?

b. Comment tu t'appelles?

c. Comment il s'appelle?

d. Je m'appelle...

e. Bonjour,

Madame/Monsieur.

f. Elle s'appelle...

To introduce yourself

Sketch the graph of the reciprocal $1 / f$.

$$f(x)=x-3$$

According to the Christian Science Monitor, 80 percent of egg cartons are imprinted with the logo "Animal Care Certified.."27 This designation means that the United Egg Producers, the egg industry's trade group, has certified egg producers according to internal guidelines.

What do you think the typical consumer interprets "Animal Care Certified" to mean?