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

(a) Calculate the $\mathrm{pH}$ of a solution prepared by mixing $0.0800 \mathrm{~mol}$ of chloroacetic acid plus $0.0400 \mathrm{~mol}$ of sodium chloroacetate in $1.00 \mathrm{~L}$ of water.

(b) Using first your head and then the Henderson-Hasselbalch equation, find the $\mathrm{pH}$ of a solution prepared by dissolving all of the following compounds in a total volume of $1.00 \mathrm{~L}: 0.180$ $\mathrm{mol}$ $\mathrm{ClCH} \mathrm{CO}_2 \mathrm{H}, 0.020$ $\mathrm{mol}$ $\mathrm{ClCH} \mathrm{CO}_2 \mathrm{Na}, 0.080$ $\mathrm{mol}$ $\mathrm{HNO}_3$, and $0.080$ $\mathrm{mol}$ $\mathrm{Ca}(\mathrm{OH})_2$. Assume that $\mathrm{Ca}(\mathrm{OH})_2$ dissociates completely.

Multiply or divide if possible.

$$\frac { 1 } { 2 } \left( - \frac { 4 } { 5 } \right)$$

Graph each function. Based on the graph, state the domain and the range and find any intercepts.

$$f(x)=\left\{\begin{array}{ll}{\ln (-x)} & {\text { if } x \leq-1} \\ {-\ln (-x)} & {\text { if }-1<x<0}\end{array}\right.$$

Name the following compounds: (a) $\mathrm{SnO}_2$ (b) $\mathrm{Ca}(\mathrm{CN})_2$ (c) $\mathrm{Na}_2 \mathrm{CO}_3$ (d) $\mathrm{Cu}_2 \mathrm{SO}_4$ (e) $\mathrm{Ba}(\mathrm{OH})_2$ (f) $\mathrm{Fe}\left(\mathrm{NO}_3\right)_2$

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) $\mathrm{AgClO}_3(a q)$

Why did the passage of the Hawley Smoot Tariff result in a decline in American foreign trade in 1930?

Give a recursive algorithm for finding the minimum of a finite set of integers.

Why are school vouchers controversial?

These static final variables arc members of the numeric wrapper classes and hold the minimum and maximum values for a particular data type.

a. MIN_VALUE and MAX_VALUE

b. MIN and MAX

c. MINIMUM and MAXIMUM

d. LOWEST and HIGHEST

Graph each function. Based on the graph, state the domain and the range and find any intercepts.

$$f(x)=\left\{\begin{array}{ll}{\ln x} & {\text { if } 0<x<1} \\ {-\ln x} & {\text { if } x \geq 1}\end{array}\right.$$

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

What steps do you need to take to solve the equation $\frac{1}{2} x+6=18$?

(A) Add 6. Then multiply by 2.

(B) Subtract 6. Then divide by 2.

(C) Add 6. Then divide by 2.

(D) Subtract 6. Then multiply by 2.

A Mach number $M$ indicates the speed of a supersonic airplane. You can find an airplane's speed $a$ in miles per hour using the formula $a=M s$ where $s$ is the speed of sound at the altitude of the airplane. Find an airplane's speed in miles per hour if the airplane travels at Mach $2.5$ at an altitude where the speed of sound is $710 \mathrm{mi} / \mathrm{h}$. A. $177.5 \mathrm{mi} / \mathrm{h}$ B. $284 \mathrm{mi} / \mathrm{h}$ C. $1775 \mathrm{mi} / \mathrm{h}$ D. $2840 \mathrm{mi} / \mathrm{h}$