i need the answer quickly 8. The diffusion coefficient, D, of tetracycline in a hydroxylethyl methacrylate membrane is 8.2 x 10° cm/sec and thepartition coefficient, Km, for tetracycline between the membrane and the drug reservoir is 8.4. If the membranethickness, h, is 140 um, what is the permeability, P, of tetracycline in this system?a. 6.89 x 10° cm/secb. 4.92 x 10° cm/secc. 1.06 x 10* cm/secd. 9.64 x 10" cm/sec|Step by step please and detailed SOLUTION Wrong answer and copied answer gives u downvoteSo please don't copy from chergg or other internet site

Answered: Image /qna-images/answer/de7961ca-431f-4a1d-8566-7328dce41b15.jpg

Answered: 8. The diffusion coefficient, D, of…

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter3: Statistical Tests With Excel

Section: Chapter Questions

Problem 6P

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The partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of chloroform is 0.4693, are 74.166 cm3mol-1 and 80.235 cm3 mol-1, respectively. What is the volume of 1,000 kg of this solution? Data: M.M. (acetone) = 58.08 gmol-1; M.M. (chloroform) = 119.07 gmol-1.
What is the usual rate-limiting step for a poorly soluble and highly permeable drug (BCS 2)? This under Bipharmaceurics and Pharmacokinetics subject
Two students measured NH3 in the aquarium and observed values of 106 and 115 mV. What NH3 nitrogen concentration (in ppm) should be reported by each student?
A 25.00 mL sample of an aqueous solution Y is extracted with 50.00 mL of hexane. After extraction, it was found that 94.12% of solute Y was successfully removed from the aqueous solution. Calculate: i. The distribution constant for this separation The initial concentration of Y if 1.77 mmol Y remains in aqueous solution after extraction. iii. The concentration of Y in BOTH phases after extraction
The distribution coefficient of hydrogen sulfide between benzene and water at 25 degrees Celsius is 5.9880. What is the minimum volume of benzene at 25 degrees Celsius necessary to extract in a single step 80% of the hydrogen sulfide from 1 liter of 0.15 molar aqueous solution of hydrogen sulfide?a.) 0.1336b.) 23.9520c.) 0.6680d.) 1.5030E.) none of the above
Sodium chloride (NaCl) was isolated from SiO2 and CaCO3 by dissolving it in distilled water. Unmentioned is that CaCO3 is slightly soluble in water (0.001 g/100 mL). Describe the effect this fact will have on each component of the mixture: will the “isolated“ mass of each be greater than, equal to, or less than that in the sample?
1) How many milliliters of 70% ethanol and 20% ethanol must be mixed to prepare 500ml of 30% ethanol? 2) A gaseous blend of nitric oxide and nitrogen (NOmax) contains 0.09% v/v nitric oxide (NO) and 99.92% v/v nitrogen. Express the strength of nitric oxide in PPM (round to whole number) 3) The ratio strength of a 10mL vial of neostigmine methylsulfate injection USP is 1:1500.Calculate the amount of neostigmine methylsulfate in milligrams contained in the 10mL vial. (Round to the whole number).
a bottle of 297.6ml of water from a creek at 0 degree celsius in the winter was collected and required 14.05 mL of 10.22mM thiosulfate. Calculate the dissolve O2 and express in mg O2/L. COrrect number of significant figures
Prepare the following solutions: 100.0 mL 0.0500 M stock Ca2+ solution 50.0 mL 0.0050 M working standard Ca2+ solution from 0.0500 M Ca2+
The distribution coefficient, KD (C water/C ether), between ether and water for aspirin at room temperature is 0.30. What weight of aspirin would be extracted by a single extraction with 300 mL of water from a solution of with a concentration of 0.67 M? Calculate the weight of aspirin which would be removed by three extractions with 100 mL portions of water. Compare the weight of solute extracted in single extraction process with the triple extraction process. Take note: The volume of the solution is 100ml
Extraction of Caffeine Post-lab 8. Ethanol is miscible with water. (After all, alcoholic beverages don t separate into an “alcohol‟layer” and a “water layer.”) Assuming that caffeine is soluble in ethanol, could you useethanol as a solvent to extract caffeine from coffee (rather than using dichloromethane asthe extraction solvent)? Explain why or why not. 9. A 12 oz can of Coke contains 46 mg of caffeine. One fluid ounce is equivalent to 29.57 mL(1 oz = 29.57 mL). What is the concentration of caffeine in Coke, in units of mg/mL? Showyour work. 10. What is an alkaloid?
The solubility of benzoic acid in water is 0.21g per 100mL of water at 10 degrees celsius, 0.27g per 100mL at 18 degrees celsius, and 6.80g per 100mL at 95 degrees celsius. A. At least how much water would be needed to dissolve a 2.00g sample of benzoic acid at 95 degrees celsius? B. If you carried out a recrystallization by dissolving your 2.00g sample in water at 95 degrees celsius, then cooling it to 18 degrees celsius, what would be the maximum yield of benzoic acid? How would the yield be affected if the recrystallization mixture was cooled to 10 degrees celsius instead?

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