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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.
How many mL of oxygen gas, measured at 757.2 mm HG (uncorrected) and 22.8 C by the displacement of water, would you expect to obtain from the complete decomposition
The molecules CO2 and SCL2 are both of the general molecular type AB2, but one is polar and one is not. Which molecule is polar?
The major source of aluminum in the world is bauxite (mostly aluminum oxide). Its thermal decomposition can be represented by: 2Al2O3 (s) = 4Al (s) + 3O2 (g) deltaHrxn = 1676 kJ.
If the cylinder then sits in the storage at 293 K for a long time, what is the entropy change of the universe (from the original unfilled state)?
What pH is needed such that the maximum [Mg^2+] is solution is 2x10^-4M given the equilibrium: Mg(OH)2(s) Mg^(2+) + 2OH^- also pK(sp)=8.3
Write equilibrium reaction for HNO 2 and compute equilibrium concentrations of all species, compute pH , OH - , and the pOH
How much ammonium hydroxide is needed to react completely with 75.0g of copper (2) nitrate in a double replacement reaction.
He intends to have the pH set to 10.0 . He uses acetic acid /acetate as the buffer system. Is the oH buffered in the desired range. How would you improve on Joe experiment design
a 14.0-g sample of cacl2 is dissolved in 112 g of water with both substances at 25.0degc. calculate the final
Calculate the pressure, in atmospheres, of 3.94 mol CO(g) in a 4.25 L tank at 31 degrees C.
Calculate the number of free electrons per cubic meter for copper, assuming that there is one free electron per copper atom. The electrical conductivity and density
Aqueous ammonium chloride and aqueous lead(II) nitrate Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTION if no reaction occurs.
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