Identify each underlined word by writing above it ADJ for adjective or PRON for pronoun. For $\underline{much}$ of our vacation, Dad had found $\underline{another}$ route for us to follow.

Name the following binary molecular compounds:

$$\\$$

(a)

$$\mathrm{NCl_3}$$

(b)

$$\mathrm{IF_7}$$

(c)

$$\mathrm{P_4O_6}$$

(d)

$$\mathrm{S_2Cl_2}$$

A molecular biologist wants to isolate a gene from a scorpion that encodes the deadly toxin found in its stinger, with the ultimate purpose of transferring this gene to bacteria and producing the toxin for use as a commercial pesticide. Isolating the gene requires a DNA library. Should the molecular biologist create a genomic library or a cDNA library? Explain your reasoning.

The molecular formula for butane is $\mathrm{C}_4 \mathrm{H}_{10}$. Do you think that butane has the properties of an acid? Explain

Water put into a freezer compartment in your refrigerator goes to a state of less molecular disorder when it freezes. Is this an exception to the entropy principle? Explain.

If 4.04 g of N combine with 11.46 g O to produce a compound with a formula mass of 108.0 u, what is the molecular formula of this compound?

Why does the melting point of hydrocarbons get higher as the number of carbon atoms per molecule increases? (a) An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon. (b) The induced dipole-induced dipole molecular attractions become stronger. (c) Larger hydrocarbon chains tend to be branched. (d) The molecular mass also increases.

Name the following binary molecular compounds.

a. $\text{Cl}_2\text{O}$ b. CO c. $\text{PI}_3$ d. HI

Write the letter for the word that best completes given sentence.
_________ Rita's ______ was momentarily shaken when the rest of us shouted "Surprise!"
a. composure
b. pandemonium
c. alacrity
d. incitement

Identify each solid as molecular, ionic, or atomic. a. $Ar(s)$, b. $H_2O(s)$, c. $K_2O(s)$, d. $Fe(s)$

Find an equation for the parabola that has its vertex at the origin and satisfies the given condition(s). Opens upward with foc us 5 unit s away from the vertex.

For each of the following sentences, write the correct past or past participle verb form above the verb in parentheses. Has Carlotta (ring) the bell for us to begin the sack race?

Choose the best description of temperature.

(a) a relative measure of hotness and coldness

(b) a measure of the average molecular kinetic energy of a substance

(c) both (a) and (b)

Write the formula for each of the following molecular compounds: a. sulfur dibromide b. carbon disulfide c. tetraphosphorus hexoxide d. dinitrogen pentoxide