What are the likely formulas of the following molecules? (a) $\mathrm{AlCl}_{\text {? }}$ (b) $\mathrm{CF}_2 \mathrm{Cl}_{\text {? }}$ (c) $\mathrm{NI}_{\text {? }}$ (d) $\mathrm{CH}_? \mathrm{O}$

Next to word part, indicate what type it is (Prefix =P, Combining Form =CF, Suffix =S ). Then write its meaning. Be sure to check your spelli

Word Part : etym/o-

Type: _________

Meaning:______________________________

A sample of Freon-12 $\left(\mathrm{CF}_2 \mathrm{Cl}_2\right)$ occupies $25.5 \mathrm{~L}$ at $298 \mathrm{~K}$ and $153.3 \mathrm{kPa}$. Find its volume at STP.

Let f be a nonnegative function with a continuous first derivative on [a, b] and suppose that g(x)=cf(x) and h(x)=f(cx), where c>0. When the curve y=f(x) on [a, b] is revolved about the x-axis, the area of the resulting surface is A. Evaluate the following integrals in terms of A and c.

$$\int _ { a } ^ { b } 2 \pi g ( x ) \sqrt { c ^ { 2 } + g ^ { \prime } ( x ) ^ { 2 } } d x$$

Of the molecules $\mathrm{C}_1 \mathrm{SO}_2 \mathrm{CH}_3, \mathrm{C}_1 \mathrm{SO}_2 \mathrm{CF}_3$, and $\mathrm{ClSO}_2 \mathrm{CCl}_3$, which has the largest $\mathrm{X}-\mathrm{S}-\mathrm{X}$ angle? Explain briefly.

What are likely formulas for the following substances? (a) CCl? (b) AlH? (c) CH?Cl$_2$ (d) SiF? (e) CH$_3$NH?

a) Name another vector equal to $\overrightarrow{D E}$ in the earlier diagram . b) Express $\overrightarrow{\mathrm{DF}}$ in terms of $\overrightarrow{\mathrm{BC}}$. c) Express $\overrightarrow{\mathrm{CF}}$ in terms of $\overrightarrow{\mathrm{DE}}$.

Next to word part, indicate what type it is (Prefix =P, Combining Form =CF, Suffix =S ). Then write its meaning. Be sure to check your spelli

Word Part : gemin/o-

Type: _________

Meaning:______________________________

noepernent waerigbke Puerberceibeeete = 6f fll + —F KF FF CF

Which of these molecules is(are) not polar? For each polar molecule, write the direction of polarity-that is, which is the negative end and which is the positive end.

(a) ${BCl}_3$

(b) ${CF}_4$

(c) ${PCl}_3$

(d) ${GeH}_4$

Find the maximum rate of change of f at the given point and the direction in which it occurs.

$$f(s, t)=\frac{s}{s^{2}+t^{2}}, \quad(-1,1)$$

Find the rate of change. Area of a square with respect to its side s when s = 5

If you stand outside all night and watch the stars, they all appear to move except one. Which star appears to remain stationary, and why?

Do basketball teams with veteran players win more games? The scatterplot shows the relationship between the average age of starters and the number of wins for the 30 NBA teams in the 2018 regular season.

The correlation for these data is r=0.39. Interpret this value.