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Organic Chemistry
what is the major product in the reaction between cyclohexane and bromine?
Organic Chemistry
Given the following standard reduction potentials in acid solution
E°(V)
Al3+(aq)+3e- ↔ Al(s) -1.66
Sn4+(aq)+2e- ↔ Sn2+(aq) +0.14
I2(s)+2e- ↔ 2I-(aq) +0.53
Which is the weakest oxidizing agent in this list?
Al3+(aq)
Al(s)
I– (aq)
I2(s)
Sn4+(aq)
E°(V)
Al3+(aq)+3e- ↔ Al(s) -1.66
Sn4+(aq)+2e- ↔ Sn2+(aq) +0.14
I2(s)+2e- ↔ 2I-(aq) +0.53
Which is the weakest oxidizing agent in this list?
Al3+(aq)
Al(s)
I– (aq)
I2(s)
Sn4+(aq)
Organic Chemistry
Under which of the following conditions will a voltaic cell do the most work?
Q/K > 1
Q/K = 1
Q/K < 1
E° < 0
Q/K > 1
Q/K = 1
Q/K < 1
E° < 0
Organic Chemistry
Two particles having charge of +0.540 nC and +8.64 nC are separated by a distance of 1.90 m.
(a) At what point along the line connecting the two charges is the net electric field due to the two charges equal to zero?
(b) Where would the net electric field be zero if one of the charges were negative?
(a) At what point along the line connecting the two charges is the net electric field due to the two charges equal to zero?
(b) Where would the net electric field be zero if one of the charges were negative?
Organic Chemistry
3. Draw a sequence of reactions to go from heptan-1-ol to a monohalogenated alkane. Draw or name the products and reactants of each reaction in this series. (6 marks)
Organic Chemistry
Pentan-3-ol plus an oxidizing yields PRODUCT A. PRODUCT A plus H2, in the presence of a catalyst, heat, and pressure, yields PRODUCT B. Draw and name both PRODUCT A and PRODUCT B. (4 marks)
Organic Chemistry
Identify the hybrid orbitals used in the given molecules.
H H H H
| | 4 |10 9 | 7..
H _____-C_____-C===C_______-C_____-O___-H
1 | 2 3 5 | 6 .. 8
H H
H H H H
| | 4 |10 9 | 7..
H _____-C_____-C===C_______-C_____-O___-H
1 | 2 3 5 | 6 .. 8
H H
Organic Chemistry
What is the pH of a solution containing 0.200 mol sodium acetate and 0.100 mol acetic acid dissolved in 100.0 mL of water, given that the pKa of acetic acid is 4.75?
This amino acid has an overall net charge of -1 at pH 8.5
Select one:
a. arginine
b. cysteine
c. histidine
d. lysine
e. proline
This amino acid has an overall net charge of -1 at pH 8.5
Select one:
a. arginine
b. cysteine
c. histidine
d. lysine
e. proline
Organic Chemistry
Consider the tetrapeptide Val-Ile-Leu-Met. What is the net charge on this peptide at pH 6.56.56.56.56.56.5? (Examples: +1, 0, OR -1)
What is the charge on leucine at pH 7? [Examples: -1, 0, OR +1]
What is the charge on tyrosine at pH 1.5? [Examples: -1, 0, OR +1]
Glycine, aspartic acid, isoleucine, leucine and valine all have pKa2's very close to 9.60.
Which would be best to prepare a 1.0 M, pH 9.60 buffer?
What is the pI of the pentapeptide Cys-Leu-Glu-Ala-Lys?
Organic Chemistry
In small peptides, six atoms associated with the peptide bond lie in a single plane. These are the alpha C, the carbonyl C, and the carbonyl O of the left-side amino acid, and the amino nitrogen, the hydrogen attached to the nitrogen, and the alpha C of the right-side amino acid. This coplanarity requires that the hybridize of the carbonyl C and the amino nitrogen both be
Select one:
a. sp
b. sp2
c. sp3
d. Trick question. The hybridization varies with the side chain.
Select one:
a. sp
b. sp2
c. sp3
d. Trick question. The hybridization varies with the side chain.
