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The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00-cm cell.
lightbulb is visible light and that the average wavelength og the light is 550 nm, how many photons are emitted by the lightbuld each second?
how efficient is the extraction of the tea leaves containing 1.0 g of caffeine with the two 3 ml portions of chloroform
What is the pH at the equivalence point? what is the pH at the 10.0 mL base added? what is the pH at the 30.0 mL base added?
At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) reverse reaction arrow 2 SO3(g) What is the value of K at this temperature?
How much work (in J) must be done to inflate the balloon when atmospheric pressure is 767 torr?
what would be the atmospheric pressure of MTBE in Pa If this sample were at equilibrium with atmospheric MTBE? KH = 1.7 M/atm.
Write the complete mechanism for the formation of Nylon-6,10 using sebacoyl chloride as one of the starting materials. You only have to show the formation of one amide bond
If 25.00 mL of 0.07976 M benzoic acid is neutralized by 26.48 mL 0.07530 M NaOH, calculate the quantities of benzoic acid and NaOH you would need to prepare the volume of 1:1 buffer.
What is the pH of a phosphate buffer when [H2PO4-] = 40 mM and [HPO42-] = 30 mM?
Principles of general chemistry second edition. In determining the average rate over an entire experiment, do I need to take the coefficients of the reactants into account?
In order to distinguish the R and S forms of a molecule an enzyme must have binding sites for how many of the groups on the stereocenter of the molecule
The managing director of a well-known company on Wall Street thrives on a diet of fruit jam, bread, pasta, and coffee. She exercises intermittently.
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