Determine the electron-group arrangement, molecular shape, and ideal bond angle(s) for each of the following:
(c) $\mathrm{CH}_2 \mathrm{Cl}_2$

Describe a characteristic that you have. Explain whether you think this characteristic is hereditary or environmental.

What is the most up-to-date information on hydrogen fuel cell use in automobiles in the United States? How many hydrogen fueling stations are there and where are they?

A compound of carbon and hydrogen contains $92.3 \% \mathrm{C}$ and has a molar mass of $78.1 \mathrm{~g} / \mathrm{mol}$. What is its molecular formula?

Suppose an MRI scanner uses 100-MHz radio waves. (a) Calculate the photon energy. (b) How does this compare to typical molecular binding energies?

Determine the molecular mass of citric acid $\left(\mathrm{H}_3 \mathrm{C}_6 \mathrm{H}_5 \mathrm{O}_7\right)$.

When we divide a polynomial P(x) by a divisor D(x), the Division Algorithm tells us that we can always obtain a quotient Q(x) and a remainder R(x). State the two forms in which the result of this division can be written.

The opening, written in the style of a fairy tale, tells of a woman who "had no luck." How has she been unlucky? What else does the writer tell us directly about the mother's character?

Determine the electron-group arrangement, molecular shape, and ideal bond angle(s) for each of the following:
(b) $\mathrm{NO}_2^{-}$

Determine the electron-group arrangement, molecular shape, and ideal bond angle(s) for each of the following:
(a) $\mathrm{SO}_4{ }^{2-}$

In the text the solid state is contrasted with the gaseous state in terms of atomic (or molecular) interactions. How would you characterize the liquid state in this regard?

What happens when the environmental lapse rate is greater than the dry adiabatic rate?

Consider the molecules BF3, PF3, BrF3, SF4, and SF6.

Which has bonds that are the most polar?

An optically active monoterpene (compound A) with molecular formula

$$C_{10}H_{18}O$$

undergoes catalytic hydrogenation to form an optically inactive compound with molecular formula

$$C_{10}H_{20}O$$

(compound B). When compound B is heated with acid, followed by reaction with

$$O_3$$

and then with dimethyl sulfide, one of the products obtained is 4-methylcyclohexanone. Give possible structures for compounds A and B.