Tema
Q:
Catalytic converters on cars transform toxic exhaust gases such as carbon
monoxide and nitrogen oxides into less toxic gases such as carbon dioxide
and nitrogen. One of the greatest health benefits of catalytic converters
was to nearly eliminate air pollution from a neurotoxic chécmical. This
chemical, which had been previously added to gasoline, had to be
eliminated since it destroyed the catalytic converters. What was this
chemical?
Q:
Select the incorrect molecular geometry that has been assigned to the following molecul
A). \( \mathrm{KrF}_{4} \) square planer
B). \( \mathrm{NH}_{2} \mathrm{Cl} \) trigonal pyramidal
C). \( \mathrm{SCl}_{3} \mathrm{~F} \) see saw
D). \( \mathrm{SnF}_{5} \) trigonal bipyramidal
E). \( \mathrm{SF}_{5} \) octahedral
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
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