## After the recrystallization, what if we don’t filter the mixture and just let it dry?

After the recrystallization, what if we don’t filter the mixture and just let it dry?
I thought the product won’t be pure compared to the filtered product but we’ll get the same amount of product at the end. Is it right??
If it is right, can you explain why the product is not pure enough?

## The oxidation of ethanol to acetaldehyde at standard temperature and pressure (STP) is spontaneous.

The oxidation of ethanol to acetaldehyde at standard temperature and pressure (STP) is spontaneous. Therefore, the electrochemical potential for this reaction is
a) positive
b) negative
c) near zero
d) not able to be determined

## Plot and calculate the midpoint potential for a protein cofactor that was measured to have the following redox data.

(i) Plot and calculate the midpoint potential for a protein cofactor that was measured to have the following redox data. The parameter R is the ratio of the reduced form divided by the total amount of protein.
(ii) Propose a redox cofactor that is consistent with the data and calculated midpoint reduction potential.
(iii) There are a lot of different redox cofactors with similar reduction potentials. Propose an experiment or set of experiments to further resolve what redox cofactor is being measured from the below given data.
Potential (mV)

## Discuss the most common problems with profiling and how a plan might address those problems.

Discuss the most common problems with profiling and how a plan might address those problems. profiling as an analytic tool that uses epidemiological methods to compare physician practice patterns across various quality of care dimensions.

## Now that we have learned about the Scientific Method, you will design a simple experiment.

Now that we have learned about the Scientific Method, you will design a simple experiment. The experiment must be based on the Scientific Method, and the data generated should be quantitative (based on numbers). The experiment does not have to be time consuming, complex or expensive. I have given some basic ideas below. You can put your own spin on one of these, or come up with your own.
Choose a question/problem you are interested in, come up with a testable hypothesis, and design a simple experiment to help answer this question. In your design, address the following:
What do you want to study, and why? (10 points)
What is your hypothesis? (5 points)
How would you set up your experiment? Give details on the methods you would plan to follow, and the materials you would require to conduct your experiment. Be as thorough as you can. (15 points)
Identify the following
Independent variable – what variable are you manipulating (5 points)
Dependent variables – what are you measuring; what is changing in response to changes in the independent variable (5 points)
Controlled variables – what are those variables you are keeping constant (5 points)
Control group (5 points)
Experimental group (5 points)
What type of data will you be collecting? How will you measure and present your results? (15 points)
PLEASE COME UP WITH AN EXPERIMENT .WHAT KIND OF EXPERIMENT CAN I DO? without it taking a long period of time no more than a couple of days to a week and doing it in the comfort of my home!

## You have a blue gumball that weighs 4.289 g. You soak the gumball in exactly 10.

You have a blue gumball that weighs 4.289 g. You soak the gumball in exactly 10.17 mL of NANOpure™ water (ultrapure water) for 50 seconds at room temperature then remove the gumball, giving you a blue colored aqueous (water) extract. Subsequently you fill a cuvette about ¾ full with this aqueous extract and find a λmaxof 609 nm with an absorbance spectrometer. This corresponds to FD&C Blue Dye #2 (MM = 466.35 g/mol). At the same time you record the absorbance at 609 nm of the aqueous extract as 0.916. The molar bsorptivity ε of FD&C Blue Dye #2 is 2.24 X 104M-1cm-1 at λmax= 609 nm. Determine the mass (in grams) of FD&C Blue Dye #2 per mass of gumball (in grams).Present the complete set of calculations for determining the grams of FD&C Blue #2 per gram of gumball. Remember to symbolically state all equations, defining all variables and constants. (Hint there are four calculations here, one using Beer’s Law to find the dye concentration, and from that another to find the moles of dye, which leads to the third to determine the mass of dye, that leads to the fourth, the desired mass of dye per mass of gumball.)

## Calculate the number of photons having a wavelength of 10 (micro)m required to produce 1 kJ of energy. So far I just have the correct units:

Calculate the number of photons having a wavelength of 10 (micro)m required to produce 1 kJ of energy.
So far I just have the correct units: wavelength = 10×10^-6 m and energy = 1×10^3 J
Would the equation be E=hc/wavelength ??
E=(1×10^3J) hc/wavelength ??

## Question: Which of the following statements, regarding Ras, is incorrect?

Question: Which of the following statements, regarding Ras, is incorrect?
a) Ras is a GPCR (G protein coupled receptor)
b) Mitogenic signaling results in phosphorylation of Ras
c) the difference between wild-type, proto-oncogenic ras and mutant, oncogenic Ras is that mutant Ras is constitutively phosphorylated and activated
d) activated Ras uses GTP to phosphorylate target proteins in a kinase cascade.
e) all of the above
The answer here is all of the above. Is there a mistake in this question? It seems to me like all are true. If not, could you explain why these are not true?

## Import And Export

### Question Description

Import and Export between Pakistan and Canada i need two slides

## TISSUES AND SKIN Pre-Lab Questions 1. What is a tissue? 2. What is the function of epithelial tissue? 3. What is the function of connective tissue?

TISSUES AND SKINPre-Lab Questions
1. What is a tissue?
2. What is the function of epithelial tissue?
3. What is the function of connective tissue?
4. What is the function of muscular tissue?
5. What is the function of nervous tissue?