Prepare a 75 ml of a 10% (w/v) FeCl3 solution. How many grams of FeCl3 must be weighed out and dissolved in 75 ml to prepare a 10% (w/v) FeCl3 solution?
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- QUESTION 3 You obtained the following raw data when setting up a Biuret standard curve: BSA (mg/ml) 0 1 2 3 4 5 6 7 8 9 10 Absorbancy 540nm 0.158 0.210 0.260 0.305 0.360 0.410 0.455 0.510 0.530 0.550 0.554 What would the quality of the line-fit (R2 value) be if you exclude experimental outliers? (Give you answer to 4 decimal places)QUESTION 2 You obtained the following raw data when setting up a Biuret standard curve: Absorbancy BSA (mg/ml) 540nm 0.158 1 0.210 2 0.260 0.305 4 0.360 0.410 0.455 7 0.510 8 0.530 9. 0.550 10 0.554 After blanking against a biuret-dH20 sample, the protein concentration of an unknown sample was determined using the same method and an absorbancy of 0.324 was obtained. curve, excluding outliers (experimental and statistical) and determine the protein concentration in the unknown sample in mg / Set up a standard ml (up to 3 significant figures). 5QUESTION 2 CH3COO-C₂H5 + H₂O → CH3COOH + C₂H5OH Ethyl acetate Acetate Ethanol Ethyl acetate, acetate and ethanol were added to water solution in concentrations of 0.3M and left at 25°C until the solution reached an equilibrium state: ethyl acetate = 0.276 M; acetate=0.012 M; ethanol = 0.012 M; The experiment was repeated at the same temperature with the initial concentration of 0.1M of ethyl acetate. What will be the concentration of ethyl acetate (in moles/liter) be once equilibrium is achieved?
- QUESTION 4 You obtained the following raw data when setting up a Bradford standard curve: BSA (mg/ml) Absorbancy 595nm 0.225 1 0.310 0.420 0.510 4 0.610 0.720 6 0.810 7 0.915 8 0.950 9. 0.980 10 0.990 Set up a standard curve. What would the quality of the line-fit (R2 value) be if you do not exclude experimental outliers? (Give you answer to 4 decimal places) N MQuestion 52 A typical body cell contains O.9% NaCl. This cell is placed in a 5% solution of NaCl?(Molecular weight: Na*=23, Cl=35, i-2) ? (LO: 7.3) What is the molarity of the 5% saline solution? O 0.86 moles/L O 0.041 moles/L 1.43 moles/L O 2.17 moles /LQUESTION 3 You obtained the following raw data when setting up a Bradford standard curve: BSA (mg/ml) Absorbancy 595nm 0.225 1 0.310 0.420 3 0.510 4 0.610 0.720 0.810 7 0.915 8 0.950 9 0.980 10 0.990 Set up a standard curve. What would the quality of the line-fit (R2 value) be if you exclude experimental outliers? (Give you answer to 4 decimal places)
- Question 1. Calculate how to make 100 ml of“Alkaline Phosphatase Reaction Buffer", a buffer containing several ingredients. Final concentrations will be: You have on the shelf: 5 mM MgCl2 MgCl2 (solid, MW=95.2 Da) 0.1 M NaCl 5 M NaCl 0.1 M Tris, pH 9.5 1 M Tris pH 9.5 0.3% Tween-20 20% Tween-20 You also have some stock solution of acid and base.Question 24 of 26 How much heat would be required to convert 7.47 mol of a pure substance from a liquid at 40.0°C to a gas at 113.0°C? Cliquid = 1.45 J/mol•°C Cgas = 0.65 J/mol•°C AHvaporization = Tboiling = 88.5 °C 1.23 kJ/molQUESTION 2 You obtained the following raw data when setting up a Bradford standard curve: Absorbancy BSA (mg/ml) 595nm 0.225 0.310 2 0.420 0.510 4 0.610 0.720 0.810 0.915 0.950 9 0.980 10 0.990 After blanking against a bradford-dH20 sample, the protein concentration of an unknown sample was determined using the same method and an absorbancy of 0.583 was obtained. Set up a standard curve, excluding outliers (experimental and statistical) and determine the protein concentration in the unknown sample in mg / ml (up to 3 significant figures).
- Question 7 Please click here to access the Unit 6 lab experiment video. Please consider the B1 extractions with 1 M aqueous sulfuric acid, which is described in the Unit 6 lab instructions document - Under the acidic extraction conditions with aqueous sulfuric acid, benzaic acid will be found predominantly in what form and in which phase (ether or aqueous)? Benzoic acid is in its protonated form and can predominantly be found in the upper ether phase. O Benzoic acid is in its protonated form and can predominantly be found in the lower aquecus phase. O Benzoic acid is in its deprotonated form las socium benzoate salt) and can predaminantly be found in the upper ether phase. O Benzoic acid is in its deprotonated form (as sodium benzoate salt) and can predominantly be found in the lower aquenus phase.Question 2 If you had 0.85ml of medicine in one syringe, 5.36ml of medicine in another syringe and 8.02ml of medicine in another syringe how many ml of medicine will you have in total?Question 16 For a Michaelis Menten reaction the following rate constants were observed: k1 = 7x 107/M-sec k1 =1x 103/sec k2 = 2 x 104/sec The value of Km is: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 0.3 M b 0.03 M 0.003 M d. 0.0003M e 0.00003 M f 0.000003 M 0.0001 M 0.01 M i 0.001M