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Question 5 Not yet answered Points out of 1.00 P Flag Question A caretenoid pigment with...
A caretenoid pigment with a molar mass of 548 g/mol has Ɛ = 15,500 L/mol-cm at λ = 600 nm. A sample of this pigment is first dissolved in 30 mL of hexane and then diluted to a total volume of 250.0 mL. A 10 mL aliquot is removed and diluted to 500 mL. This final dilution has A = 0.489 when measured at λ = 600 nm in a cell path length = 2.00 cm. Calculate the mass of...
A caretenoid pigment with a molar mass of 548 g/mol has Ɛ = 15,500 L/mol-cm at λ = 600 nm. A sample of this pigment is first dissolved in 30 mL of hexane and then diluted to a total volume of 250.0 mL. A 10 mL aliquot is removed and diluted to 500 mL. This final dilution has A = 0.489 when measured at λ = 600 nm in a cell path length = 2.00 cm. Calculate the mass of...
Question 8 Not yet answered Points out of 1.00 P Flag question Substances has Amax = 485 nm. Two 50 mL aliquots of an aqueous solution S are transferred to two different 100 ml volumetric flasks. 25,0 mL of 200.0 ppm S are added to the second flask. Both flasks are then diluted to 100.0 mL with distilled water. At 485 nm, the first flask has A = 0.589 and the second has A = 3.72. Calculate the concentration of...
Question 19 Not yet answered Flag question Marked out of 1.00 You've diluted a mass of 250 mg bromophenol blue with water, to a volume of 5 ml. What is the concentration of the bromophenol blue solution? Select one: a. 50 ug/ml b. 1.25 ug/ml c. 0.05% d. 50 mg/L e. 12.5% f.5% g. 1.25 mg/ml h.0.5% Previous page Next pag
Question 4 Not yet answered Points out of 1.00 P Flag Question A sample of sodium carbonate (Na:CO: (s), 105.99 g/mol) with a mass of 0.3531 g is titrated with 0.042 L HCl(aq). Calculate the molarity of the HCl solution. Select one O A. 0.158 M OB. 0.226 M O C. 0.056 M O D. 0.113 M O E. 0.008 M
Question 5 Not yet answered Marked out of 3 P Flag question For 3 points, identify the reactant(s) which is oxidized. 2Sc(s) + 3F2 à ScF3 Select one: O a. Sc ob. F2 O c. ScF3 O d. 12 O e. None of the above O f. All of the above Not yet answered Marked out of 3 P Flag question For 3 points, identify the reactant(s) which is reduced. Ba(s) + MgSO4(aq) à Mg(s) + BaSO4(s) Select one: O...
read the question carefully Question 4 Not yet answered Points out of 1.00 P Flag question If the atomic radius of Copper is 0.128 nm, calculate the volume of its unit cell in cubic nanometers. Round off the answer to three significant figures. Do not include the units Answer:.047 Question 5 Not yet answered Points out of 1.00 P Flag question Beryllium (Be) has an HCP unit cell for which the ratio of the lattice parameters c/a is 1.568. If...
Question 14 Not yet answered Points out of 6.00 P Flag question A circular loop of wire with a radius of 15 cm lies in the yz plane and carries a current of 1.9 A, clockwise. It is placed in an external magnetic field of the form B = 6; mT. x y The magnitude and direction of the net torque are: Select one: a. 0.81 E-3 Nm, +x direction O b. 0.81 E-3 Nm, uz direction O c. 8058.20...
Not yet answered Graded out of 1.00 Flag question Question text In the process of photosynthesis, water and carbon dioxide are produced. Select one: True False Question 2 Not yet answered Graded out of 1.00 Flag question Question text In the carbon cycle, combustion produces atmospheric oxygen. Select one: True False Question 3 Not yet answered Graded out of 1.00 Flag question Question text In a balanced chemical equation, the number of each type of atom in the reactants must...
Not yet answered Points out of 1.00 P Flag question In the figure, R - 122, C-8F, and L - 3 ml, and the ideal battery has emf = 32 V. The switch is kept in position for a long time and then thrown to position b. What are R 8 с L mo (a) the maximum charge in the capacitor plates? Select one: O a. 32.00 C ob. 24.00 C c. 96.00 LC O d. 0.20 C e. 256.00...