Question

how
we can know the number of trays if we have 3 three equilibrium
stages and trays efficiency equal to 0.8

Answer #1

We have designed a special column that acts as exactly three
equilibrium stages. Operating at total reflux, we measure vapor
composition leaving the top stage and the liquid composition
leaving the bottom stage. The column is separating phenol from
o-cresol. We measure a phenol liquid mole fraction leaving the
bottom stage of 0.36 and a phenol vapor mole fraction leaving the
top stage of 0.545. What is the relative volatility of phenol with
respect to o-cresol?

We wish to compare the weights of 36
count trays of kiwifruit from three growers A, B and C. The weight
specifications for export trays, in order to gain a maximum return
for the grower, are that the weight of a 36 count tray be: 3.4 kg ±
0.4 kg. Statistical Process Control (S.P.C.) analyses done by the
packing house have indicated that the weights of packed kiwifruit
were in statistical control when packed from these growers. Random
samples of...

why is there constant temperature and pressure at equilibrium?
how do we know this

What are three issues for the internet as we know it and how
have these issues been addressed for data-intensive
applications?
Explain the difference between Trade Secret, Patent, and
Copyright as they relate to intellectual property. Include the
duration of each.

3) What is “resonance”? How will we know when we are at
resonance in this experiment? Give another example of a resonance
phenomenon.

There are three containers that the labels are lost. We know
that they contain (a) racemic a-phenylethylamine, (b) pure (-)
a-phenylethylamine and (c) a mixture with 90% optical purity of the
dextrorotatory amine. If you can only use a polarimeter, how could
you differentiate these three containers? The specific rotation of
(+)-a-phenylethylamine at 22 °C is +40.3. (No calculation is
necessary)

If we have a baby, and we know who the mother is but we want to
determine the father using gel electrophoresis, how will we know we
have found the father?
Select one:
a. The father will match the baby at any band where the baby
does not match the mother
b. The father will match the baby at any DNA band where the baby
matches the mother
c. The father will not match any DNA bands
d. none of...

Can
pollution ever make us better? How do we know? should we aim to
eliminate all pollution? If not, what should our goal be?

2) Define a “standing wave”.
3) What is “resonance”? How will we know when we are at
resonance in this experiment? Give another example of a resonance
phenomenon.
4) Why would this experiment not work very well with a
60Hz tuning fork?

When/how do we know when(in what kind of problems), we have to
apply Latent heat (L) in thermodynamics?

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