1. In this distillation experiment we start the experiment with 10 mL of liquid mixture ofcyclohexane and toluene. However, it is not possible to obtain all 10 mL back under thecurrent procedure particularly for fractional distillation. Explain why that is the case for distillation and in particular for fractional distillation.

2. How could you modify the experiment and collect all 10 mL of the startingmaterials.

3. Plot a theoretical distillation curve of temperature (y-axis) vs. volume in mL (x-axis) fora 15 mL of a mixture containing 60% 1-propanol and 40% 2-propanol. Are these twocompounds easier to separate by distillation than cyclohexane and toluene? Explain youranswer.

4. In this experiment you were asked to collect two fractions and early fraction and a latefraction. Which of the two fractions would be richer in cyclohexane? Would there be adifference between the percent of cyclohexane in the fractions collected from fractionalvs. simple distillation.

5. What method of purification would you use to purify methanol from a solution ofmethanol and NaCl? Be specific and explain your choice of method.

Experiment - Claisen Condensation Reactions:

In this experiment, we performed a Claisen condensation reaction of ethyl phenylacetate using potassium tert-butoxide to form ethyl 3-oxo-2,4-diphenylbutanoate and ethanol without using a solvent. This allowed us to reduce waste, have reagents that have a relatively low toxicity level, and made the reaction much more convenient.

Question 2: If this reaction were run in a solution (as opposed to solvent-free) it would require several hours of refluxing and provide a much smaller yield. Why is this the case?

I cannot seem to find an answer to this question. The only thing that I can find is that the reaction is reversible when a solvent is used (which I'm assuming means that the reaction is not reversible when there is no solvent). If this is correct, why is the reaction reversible when a solvent is used, and not reversible when a solvent is not used?

A source for the answer would be appreciated if possible.

Thank you for the help in advance!

Company A began operations on January 1, 2016. At the end of 2016, the company recorded bad debt expense of $1,500. On July 1, 2017, Company A wrote off as uncollectible $800 of accounts receivable. On August 31, 2017, the company reversed $200 of the write-offs made on July 1st. On December 31, 2017, the company estimated that 3% of its total accounts receivable would be uncollectible. Accounts receivable were $150,000 on December 31, 2017. The journal entry on July 1, 2017 includes a debit to ( ) for ( ) and a credit to ( ) for ( ).

Below is a Proper Data Set of classes that Business students have taken at Highline. Each line or record in the Table represents a class that a student took at Highline. There are 227 Rows (Records) in the Table. The Quarter Column represents the quarter the class was taken The Year Column represents the quarter the class was taken The Department Column represents the quarter the class was taken The Class # Column represents the quarter the class was taken The Credits Column represents the quarter the class was taken The Grade Column represents the quarter the class was taken Using a PivotTable, create a Joint Probability Table for the variables (Column) Department and Quarter).

Taxes are the way our government generates income. Although the richest Io/o of the people in our country pay 39% of the taxes and the bottom 50% combined pay only 2.9% combined, everyone wants things from the government. They want roads and bridges and schools and an army and welfare and Medicaid and concerts and ]..... To provide these things our government has to raise money and cut expenses. Which of the following laws help raise money? Which help cut expenses?

1)Deduction for contribution to the church

2) American Opportunity Credit for attending San Jacinto College

3) Deduction for gift to the American Red Cross

4) Child credit

5) Deduction for mortgage interest

6) Deduction for home equity loan

7) Deduction for savings bond interest used for higher education (2 things)

8) Deduction for health savings account

9) Deduction for student loan interest

10) Adoption credit

11) Earned Income credit

12) IRA deduction

1. Let V be real vector space (possibly infinite-dimensional), S, T ∈ L(V ), and S be in- vertible. Prove λ ∈ C is an eigenvalue of T if and only if λ is an eigenvalue of STS−1. Give a description of the set of eigenvectors of STS−1 associated to an eigenvalue λ in terms of the eigenvectors of T associated to λ.

2. Show that there exist square matrices A, B that have the same eigenvalues, but aren’t similar. Hint: Use the identity matrix as one of the matrices.

Can you write about the principle of Annexin V/Propidium iodide staining, the principle of Annexin V-FITC binding to PS, and its advantages and disadvantages. Thank you in advance, it really means a lot to me. I appreciate it!!!

a. Report hazard/safety precautions that must be followed when handling NaBH4, H2O2 (aq., 30% v/v), and acetic acid (glacial). Use reagent MSDS information.

b. Briefly describe the use of Bradyʼs reagent to identify the presence of electrophilic carbonyl groups.

For each problem, sketch the appropriate process diagram on a T-v, P-v or P-h diagram

1) Oil enters the outer tube of an insulated concentric tube heat exchanger at a temperature of 500k, and exits at a temperature of 400k. The mass flow rate of the oil is 5 kg/s, and the oil has a specific heat of Cp=1.91 kJ/kg*K. Saturated liquid water at 100 degrees celsius enters the inner tube, and exits at 100 degrees celsius with a quality of 0.20. Determine the mass flow rate of the water.