Question

1. For the preparation of 2-bromo-4-n-butyl phenol from phenol, the first step is:

A. acylation

B. conversion to anisole

C. HNO3 / N2SO4

* And if able to answer:

2. The n-butyl group is installed by:

Answer #1

1. How do you prepare anisole? (methoxybenzene)
a. Bromobezene with CH3O-
b. Phenol with CH3OH in H2SO4
c. Phenolate with CH3Br
d. cyclohexanone with CH3MgBr in H3O+
2.What is the major product of an SN1 reaction with 3-bromo
3-phenyl butane with ethanol?

When sythensising 4-bromo- 2-chloroacetanilide from 4-
bromoacetanilide, the first step was to dissolve the 4-
bromoacetanilide in HCL and acetic acid the mixture is heated
gently. why is it important to heat gently? That is,
explain why it may be problematic to heat the mixture more
aggressively, e.g., above 100

1. Draw the major products only expected from the reaction of
2-bromo-3-methylpentane with each of the following:
A. CH3CH2O-
B. (CH3)3CO-
C. CH3CH2OH
2. Starting with an appropriate alkyl halide and using any other
needed reagents, how could you synthesize the following?
A. butyl sec-butyl ether
B. CH3COCH2CH3
||
O
C. (CH3)3CCH=CH2

1.
The first step in identification of an unknown would be a(n)
a.
Gram stain
b.
Preparation of a stock slant
c.
Streak plate preparation
d.
Incubation of fluid thioglycollate broth
2.
A pure colony is best defined as a(n)
a.
well isolated mass of cells
b.
well isolated mass of cells all derived from a single cell
c.
mass of cells ranging in size and pigment
d.
isolated mass of cells that have the same appearance on an agar...

A. rank the following according to acid
strength.
1. phenol
2. meta-nitrophenol
3. 4-nitrophenol
B. explain why

Let the population have N=7 units, with {(unit,value)} =
{(A,-1),(B,+1),(C,-2),(D,+3),(E,-4),(F,+5),(G,-6)}. The design is
as follows: first choose A or B at random; if A then choose from
{C,D} at random, if B then choose from {E,F,G} at random. 1) Find
the first-order inclusion probabilities (note that the sample size
n is fixed at 2).
Verify (show numerically for this example) that the
Horvitz-Thompson estimator is unbiased for the population total.
(Hint: find the probability of each sample and the value...

The transition from n = 6 to n = 2 produces
the Balmer series line with wavelength λ0. The
wavelength is 4 times larger than an n = x to
n = 1 transition in the Lyman series. Determine the value
of x.
Group of answer choices
3
5
6
2
4

1. How many electrons could occupy a subshell with the following
quantum numbers?
a. n=2, l=1
b. n=2, l=0, ml=0
2. How many orbitals are described by each of the below
combinations of quantum numbers?
a. n=3, l=3
b. n=4, l=2, ml=2
3. How many milliliters of 0.100 M HNO3 are needed to neutralize
the following solutions?
a. 34.7 mL of 0.775 M NaOH
b. 58.5 mL of 0.0100 M Al(OH)3
4. How many milliliters of 0.100 M NaOH are...

4.). An excited electron falls from n=4 to n=2.
a.) Calculate the energy change in Joules associated
with this transition
b.) what Is the wavelength in nm of the emmitted
electromagnetic radiation? what color Is it?
c.) calculate the energy change in Kj mol -1.

An electron in He+ undergoes a transition from n = 4 to n = 2
state. Calculate the (a) energy in J, (b) frequency in Hz, (c)
wavelength in nm and (d) wave number in cm-1 of the photon
emitted.

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