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The voltage across a lead-ion indicator electrode and a silver-silver chloride reference electrode immersed in 2.50X10-3 M Pb(NO3)2 at pH 4.0 was 0.278 V. If k(Cd2+/Pb2+) is 0.31. calculate the absolute and relative error in terms of the concentration of Pb2+ when the electrodes are used to measure the lead-ion concentration in a solution containing 3.17X10-2 M Pb(NO3)2 and 8.03X10-3 M Cd(NO3)2
A weather balloon containing 605 L of He is released near the equator at 1.01 atm and 305 K. It rises to a point where conditions are 0.489 atm
How many grams of Cu(OH)2 will precipitate when excess KOH solution is added to 63.0 mL of 0.610 M CuSO4 solution.
A particular sensitizer can absorb photons of one wavelength and release photons of a longer wavelength. Why must the radiation be at a longer wavelength
What is the vapor pressure in mmHg of a solution prepared by dissolving 5.00g of benzoic acid (C7H6O2) in 100g of ethyl alcohol (C2H6O) at 35 C?
Write the nuclear equation for the alpha decay ( production of radioactive decay that may be considered radioactive waste products by the useful production of nuclear energy ) of each nuclide that are products of a nuclear power plant Rn-222, T..
Ammonia reacts with oxygen according tot he following equation: 4NH3+5O2=4NO+6H2O deltaHrxn = -906kJ Calculate the heat (in kJ) associated with the complete reaction of 155g of NH3.
Why is it possible to separate the product (6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone) from sodium hydroxide using acetone?
Compute the work done when 55.0 grams of tin mixes in excess acid at the pressure of 1.00 atm and at a temperature of 24°C.
Suppose you have just added 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter to 100.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77 x 10^-5
Determine osmolarity of solution when 25.0 grams of aluminum chloride dissolves in 2.50 liters of H2O.
Compare and contrast the endo vs exo-nuclease excision repair mechanisms of DNA polymerase.
The pH of 0.325g of aspirin (Molar mass 180.2) tablet in 0.5L water is 3.03, What is the pKa for weak, monoprotic acid aspirin? do not disregard x
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