Which substance takes the shape of and fills the volume of any container into which it is placed? (1) $\mathrm{H}_{2} \mathrm{O}(\ell)$ (2) $\mathrm{CO}_{2}(g)$ (3) $I_{2}(s)$ (4) $\mathrm{Hg}(\ell)$

Which Is characteristic of all mixtures? (1) They are homogeneous. (2) They are heterogeneous. (3) Their compositions are in a definite ratio. (4) Their compositions may vary.

Study the entries and answer the questions that follow.

The prefixes ambi and amphi mean "both" or "around." The roots luc and lum mean "light." The prefix super means "above" or "over." The root magn means "great."

Using literal translations as guidance, define the following words without using a dictionary.

A. luminary

B. translucent

C. amphibious

D. magnitude

E. magnate

F. superintendent

Which quantity, expressed in grams, is equal to one mole of Au? (1) the atomic mass (2) the atomic number (3) the mass of neutrons (4) the number of neutrons

Use a number line to complete the below statement with one of the two symbols $<$ or $>$. $\newline$ 0 $\bigcirc$-5.

For each reaction, identify the substance being oxidized and the substance being reduced.

(a) $2 \mathrm{Sr}(\mathrm{s})+\mathrm{O}_2(g) \longrightarrow 2 \mathrm{SrO}(\mathrm{s})$

(b) $\mathrm{Ca}(\mathrm{s})+\mathrm{Cl}_2(g) \longrightarrow \mathrm{CaCl}_2(\mathrm{~s})$

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

The Call That Wasn't Made It was a day like any other day on the campus of Valparaiso University, a small educational institution in the heart of the Midwest. Then it happened-an explosion. Suddenly the serene campus setting turned into mass hysteria. The explosion had occurred in an advanced chemistry class, and nearly 40 students and a professor had been seriously injured. Some of the victims wandered around in shock, while others simply stared ahead, numb and disbelieving. Within a matter of minutes, calls had been made to police, firefighters, hazardous materials specialists, and medical personnel. Almost immediately, all were on the scene. However, amid the confusion and rush, one phone call was not immediately made-a call to the hospital emergency room, alerting its staff that a large number of people injured by a chemical explosion would soon be on their way. Don't be alarmed. The situation just described was a simulated disaster, part of a community disaster drill alert. In a newspaper article, the drill coordinator, Gregory L. Eckhardt, said of the failure to call the emergency room, "It's communication. We've got to get everyone on the same frequency." He noted that everything else in the drill worked well that day and the cooperation was tremendous. A hospital spokesperson expressed the situation best. The bad news, she said, was that people in leadership positions forgot to make the call. However, the good news was that this mistake happened when everything was pretend. "When lives are on the line," she said, "the job will get done, because now everyone has learned." State why details are important to good leaders.

At STP, which element has a definite shape and volume? (1) Ag (2) Hg (3) Ne (4) Xe

Write the letter of the key term that best matches each definition below.

a. trade surplus

b. retooling

c. clear-cutting

d. acid rain

e. trade deficit

f. market economy

g. post-industrial

h. tariff

precipitation that carries high amounts of acids

Find the indicated integral.

$$\int \frac{x^{4}+1}{x^{4}-1} d x$$

For each of the following balanced chemical equations, calculate how many moles of product(s) would be produced if $0.500$ mole of the first reactant were to react completely.
c. $\mathrm{C}_3 \mathrm{H}_8(g)+5 \mathrm{O}_2(g) \rightarrow 4 \mathrm{H}_2 \mathrm{O}(l)+3 \mathrm{CO}_2(g)$

What is the percent by mass of oxygen in $\mathrm{Fe}_{2} \mathrm{O}_{3}$? The formula mass of $\mathrm{Fe}_{2} \mathrm{O}_{3}=160 \mathrm{amu}$. (1) 16% (2) 30% (3) 56% (4) 70%

Some low-cost voice recorders do not have a separate microphone. Instead, the. speaker is used as a microphone when recording. Explain how this works.

In which liquid is hydrogen bonding the most significant force of attraction? (1) HF (2) HCI (3) HBr (4) HI