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Chemistry Questions and Answers November 25, 2019

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Given values of G f at 25 C for liquid ethanol (-174.9 kJ/mol) and gaseous ethanol (- 167.9 kJ/mol), calculate the vapor pressure of ethanol at 25 C.

How much CrCl 3 5H 2 O is needed to prepare 1.00 L of solution containing 20.0 g Cr 3+ per L What will be the concentration of the Cl - ions?

If you wanted to anodize 1.00 mol of Al to Al203, how many mol of electrons would you need to provide (via the power supply) 1.

2. The power supplies used in lab have a maximum current rating of 700 mA. Assuming the power supply constantly operated at the maximum current, how long would you need to run the anodization in order to produce 1.00 mol of Al,O3

In 2000, Ceresa, Pretsch, and Bakker 1 published a paper titled Direct Potentiometric Information on Total Ionic Concentrations . In this paper they investigated the use of three ion-selective electrodes to determine the concentration of calcium in solutions. Retrieve the paper and answer the questions below: Describe the main similarities and

2.) Lets say you want to label a protein of interest. You can use the same mechanism to get a label on there Draw me the mechanism. It is EXACTLY the same as above, except its an ortho product instead of para. (6 points). If you think thats cool, go tell Dr. Jewett you think so they made it a few years ago a da b protein of interest OH C OH VN. N
2.) Lets say you want to label a protein of interest. You can use the same mechanism to get a label on there! Draw me the me

The following chemical reaction takes place in aqueous solution ZnBr2(aq)2 KOH(aq) Zn(OH)2(s)2 KBr(aq) Write the net ionic equation for this reaction.

3. Which of the following gases is most likely to deviate from the behavior of an ideal gas Please briefly explain your reasoning. O N SF4 CH6 4. Given the following information, please find the partial pressure of He. Please show all work. T 25.0C V 15.0 L P 1.30 atm He Ar Kr N CO X 0.10 0.25 0.15 0.25
3. Which of the following gases is most likely to deviate from the behavior of an ideal gas? Please briefly explain your reasoning. 4. Given the following information, please find the partial pressure of He. Please show all work. He: T = 25.0?C V=15.0 L P = 1.30 atm 0.25 0.15 0.25 Kr

You will be researching three organizations in the same industry. Choose carefully--based on your analysis, one of these organizations will be the company you create a business plan for. Examples may be: Airlines (Southwest, American, Spirit); Cell phone providers (AT&T, Verizon, T-Mobile), Car companies (Tesla, Ford, BMW), etc. Its strongly

Given that aqueous conditions have a pH range of 0-14, why is a pKa of 30 not of interest in extractions using aqueous conditions? (remeber that pKa refers only to acidity of a molecule)

A 800.0 L sample of drinking water is found to contain 2.00 mg of arsenic. What is the concentration (in M) of arsenic in the sample? A: 3.34 x 10 -8

The calorie content of a candy bar is 230 calories per serving (1 bar). Calculate the specific energy (kJ/g) of the candy bar. (1 candy bar = 52.7 g, 1 calorie = 4.184 J)

Consider a tank of constant volume V and containing at time t an amount Q(t) of pollutant, evenly distributed throughout the lake with a concentration c(t), where c(t)-Q(t)/V. Assume that water containing the concentration k of pollutant enters the lake at a rate r, and that water leaves the lake at the same rate. A) If at time t=0 the

The freezing point of diet soda is higher than the freezing point of regular soda, but lower than 0 degree C, the freezing point of pure water. Explain why both diet and regular soda freeze at temperatures lower than 0 degree C. Why does diet soda freeze at a higher temperature than regular soda?

The half-life of 235U, an alpha emitter, is 7.1108 yr. Calculate the number of alpha particles emitted by 7.6 mg of this nuclide in 9.0 minute.