The molar absorptivity of a compound was 1.87e+3 L cm- mol-. What as the molar concentration if the pathlength was 2.00 cm and the % t ransmittance was 47.7?
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Given information:
Molar absorptivity = 1.87e+3 L/cm.mol
Path length = 2.00 cm
% transmittance = 47.7
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Solved in 4 steps
- ing 0.03% w/w_of the same drug, who would be the percentage strength (wh) a of of the mixture? 23. A physician prescribes an suspension to contain 100 mg of corti- at n ophthalmic st sone acetate in 8 mL of normal saline solution. The pharmacist has on hand a (2.5% suspension of cortisone acetate in normal saline solution. How many milliliters of this and how many milli- le S liters of normal saline solution should b be used in preparing the prescribed sus- pension?gorq ww.Ps-3/9rie 24. R Benzalkonium ChlordaI have one question : Find the A and T% of a 6.5X10-4 Mol L-1 solution of a drug ( molecular weigth 200 ) whose absorpitvity is 0.026 L cm-1 g-1 at 520 nm when measured in a cell of 2.00 cm pathlength ?1:4 (vv) piperidine/DMF CF,CO2H Y CH,Cl2 NH H2N. H2N H,N. NH NH2 NH3 NH2 + II II IV Consider the reaction scheme given above. What are products 'X' and 'Y'? O X = II; Y = IV O X = IV; Y = || O X = II; Y = II O X= 1; Y = II
- 4g 5 g 2 g 100 g 49." R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil is contained in 30 g of the mixture? (c) If the specific gravity of the mixture is 0.781, what are the percent w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?auDUIUance UI U.I JU ai 4JJ IIII III 1. UU CIII cuvclic. Calculate the molar absorptivity of the pigment at 453 nm? Q5) A student is tasked to determine the number of moles of H2SO4 (aq) in a 200 ml of an unknown solution. The student prepares a series of solutions with known concentrations of H2SO4 (ag) and measures the absorbance of each at an appropriate wavelength. These data are used to construct the calibration plot shown below. 1.00 0.80- 0.60 - 0.40- 0.20- 0.00- 3 x 10-4 6 x 10-4 Concentration (mol/L) If the absorbance of the unknown solution is 0.70, how many moles of H2SO4 (aq) does the 200 ml sample contain? Absorbance5. (1) (ii) Ibuprofen (206.3 g/mol) absorbs at 255 nm and shows a molar absorptivity of 3010 L/mol.cm. A tablet of ibuprofen, 0.6654 g, was ground and 0.2203 g powder was dissolved in 20% methanol in a 100 mL volumetric flask (Solution A). Exactly 5.0 mL of Solution A was diluted in a 50.0 mL flask and the resulting solution showed an absorbance of 0.1228 AU in a 1.00 cm cell. (i) What is the concentration (mol/L) of ibuprofen in the 100 mL stock solution? (ii) Report the amount of ibuprofen in mg/Tablet. Ibuprofen H3C | HCCH; 1 H3C CH3 -CH-COOH
- Predict the B-elimination product formed when each chloroalkane is treated with sodium ethoxide in ethanol. If two or more products might be formed, draw only the major product. (a) • All hydrogen atoms are implied. • Apply formal charges where appropriate. • Omit lone pairs and radical electrons from your answer. ITAYY Cl #[ ] در • Sn Ⓡ Previous NextCalculate Ksp = () A2BO3 ->2A*+ BO32- Molar concentration of At = Molar concentration of BO32- = 2 M %3D (*Answer in whole number only. No unit)h) i) j) Ph + НО OSI(CH3)3 Br PPH3 1) "BuLi /THF/rt / 1.5 h H CH3 homo /rt / 1 h 2) -Si(CH3)3 OCH3 TiCl4 CH₂Cl₂/-78°C / 15 min PPh3/1₂ (1 eq) imidazole / THE 0°C-it
- Separation of individual components from a multi-component mixture can best be carried by Solvent extraction A O BO all the three methods Fractional distillation CO Chromatography D OI dont understand how to do this?Hexanoic acid was added to an immiscible biphasic solvent system, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D2) of hexanoic acid in water with respect to CCl4.