Tema
Q:
Synthesizing what you know about the sources and formation of diffe
air pollutants, high levels of which pollutant would be least associated
with close distance to a freeway?
PM10
Carbon monoxide
Ozone
NOX
Q:
Given that the distance separating the nuclei in the 12 molecule is 2.66 A , the bonding
radius of an iodine atom is:
A). 5.32 A
B). -5.32 A
C). 1.33 A
D) -1.33 A
E). 0 A
Q:
1. \( 0 \circ \circ \mathrm{C} \) จะมีค่าในหน่วย \( \mathrm{K} / \mathrm{oR} / \mathrm{oF} \) เท่าไหร่ ?
2. 373 K จะมีค่าในหน่วย \( \circ \mathrm{C} / \mathrm{oR} / \mathrm{oF} \) เท่าไหร่
?
3. \( 30 \circ \mathrm{C} \) จะมีค่าในหน่วย \( \mathrm{K} / \mathrm{oR} / \mathrm{oF} \) เท่าไหร่ ?
4. \( 55 \circ \mathrm{C} \) จะมีค่าในหน่วย \( \mathrm{K} / \mathrm{oR} / \mathrm{oF} \) เท่าไหร่ ?
5. \( 140 \circ \mathrm{C} \) จะมีค่าในหน่วย \( \mathrm{K} / \mathrm{oR} / \mathrm{oF} \) เท่าไหร่ ?
Q:
What functional groups are involved in forming a peptide bond?
Q:
Draw the Lewis structure of \( \mathrm{BBr}_{3} \).
Q:
Draw the Lewis structure for \( \mathrm{PCl}_{5} \). Include lone pairs.
\begin{tabular}{c|c|c} Select & Draw & Templates \\ \hline\end{tabular}
Q:
Draw a Lewis structure for \( \mathrm{SO}_{2} \) in which all atoms have a formal charge of zero. Do not consider ringed structures.
\( \begin{array}{c}\text { Select } \\ \text { Draw }\end{array} \)
Q:
Draw a Lewis structure for \( \mathrm{SO}_{2} \) in which all atoms obey the octet rule. Show formal charges. Do not consider
ringed structures.
Select Draw
Q:
b. A sample of 50 g of ethanol, increases in temperature from \( 0^{\circ} \mathrm{C} \) to \( 25^{\circ} \mathrm{C} \). What is
the amount of energy absorbed? Specific heat of ethanol is \( 2.42^{\circ / g^{\circ} \mathrm{C}} \)
\[ q=(25)(50)(2.42)=3,025 \mathrm{~J}-0^{\circ}-\mathrm{C}=25^{\circ} \]
Q:
produces \( \mathrm{OH}^{-} \)in water
\( \begin{array}{l}\text { acid } \\ \text { base } \\ \text { both }\end{array} \)
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