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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.
The decomposition of hydrogen peroxide is a first-order process with a rate constant of 1.06 x 10-3 min -1. How long will it take for a concentration of H2O2 to drop from .0200M to .0120 M
Would the following rocedural errors causes an increase, a decrease, or no change in your calculated molecular weight? Indicate clearly the reasoning in each case
The following acid-base reaction is performed in a constant pressure calorimeter. H+ (aq) + OH-(aq) ? H2O (l) ?H=-57. 32 kJ/mol The temperature of 1000.0 g of water rises from an initial temperature of 24.5 °C to a final temperature of X °C when ..
However, a water transporter was discovered in 1992 and it was named aquaporin. Aquaporin is a single subunit protein that is barrel-shaped and open to both sides of the membrane
What are the relative populations of these levels at the boiling if the degeneracy level is 2j+ 1? Is the ground state most highly populated level?
A pound of coffee beans yields 40 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1.0 of coffee beans?
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.034 M NaOH. (c) sodium hydrogen chromate (NaHCrO4)?
Show whether or not precipitate will form in this process when the Ksp of Pbl = 9.8*10 -9
What is the mass of a glucose solution that fills a 0.500 intravenous bottle if the density of the glucose solution is 1.15 ?
How long does it take to electroplate 0.5 mm of gold on an object with a surface area of 31 cm2 from an Au3+(aq) solution with a 8 A current. Recall the density of gold is 19.3 g/cm3.
A mixture of gases contains 0.290 mol CH4, 0.250 mol C2H6, and 0.270 mol C3H8. The total pressure is 1.60 atm. Calculate the partial pressure of the gases.
what is the mole fraction of hydrogen in a gaseous mixture that consists of 8.00 g of hydrogen and 12.00 g of neon in a 3.5 liter container maintained at 35.20 degrees celsius?
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