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0.25 g of CuSO4 was added to 25 mL of deionized water. What wavelength of light would you recommend to characterize the solution's UV-Vis absorbance?
Assuming that at this wavelength, the molar absorptivity of CuSO4 is 1.8 M-1cm-1 and the path length is 1 cm, calculate the percentage transmittance of the measured solution.
A 15.0 gram sample of chromic acid is dissolved in enough water to produce 275 mL of solution. The concentration of the solution is ?
water and titrated with 0.0633 M NaOH. After 10.0 mL of base has been added, the pH was determined to be 5.07. What is the Ka for the acid?
how does the chromatographic seperation ability of thin layer chromatography compare to seperation resolving power of
Calculate the number of molecules inside the cell, which is 2.2 ?m long and 1.2 ?m in diameter.
Write the formulas for each of the following ions and compounds: (a) tetrahydroxozincate(ll) (b) pentaaquachlorochromium
The lowest energy absorption line in favor of the other dye is light in the visible region at 645 nm. Based on this evidence, explain which molecule has the higher HOMO-LUMO gap
particular amino acid in an ion exchange chromatography column. What is the peak width after the amino acid has migrated 100 cm?
Designing a synthesis of alcohol 1 presents a challenge. Why? What is this challenge? a. Forming a C-C bond two carbons removed from a hydroxyl.
If a voltage of 100 V is applied to the primary and a current of 0.25 A flows in these windings, what are the voltage output of the secondary and the current in the secondary?
A compound contains the following: 84.1% C and 15.9% H. The molecular mass of the compound is 120 g/mol. What is the empirical formula and molecular formula
which equation best describes the average rate for the reaction shown. A (aq) + B 9aq) -----> C (aq) + D (aq) A. rate= [C] [D] / [A] [B] B. rate= - deltat/-deltaB C. rate= -delta[C]/delta t D. rate= -delta[A]/delta t E. rate= [A] [B]/ [C] [D]
An aqueous solution contains metal cations from qualitative analysis from group 1, 2, 3, 4, and 5. While adding H2S in NH3/NH4Cl buffer will cause metal cations from group(S) ............. to precipitate.
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