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If a solution containing primarily 25 mg/L trisodium NTA is permissible to come to equilibrium with solid PbCO3 at pH 8.5 in a medium that contains 1.76 x 10-3 M HCO3(-) at equilibrium, define what is the value of the ratio of the concentration of NTA bound with lead to the concentration of unbound NTA, [PbT(-)]/[HT(2-)]?
calculate the osmotic pressure of a magnesium citrate laxative solution containing 30.0 g of magnesium citrate in 251
What is the steric number for either N in N2 and What is the steric number for the O atom in water? Draw the Lewis formula for water before answering the question.
A sample of an unknown peptide udergoes a single round of Edman degradation, which liberates ATZ,Gly. Another sample of the peptide is treated with trypsin, and a third sample is treated with chymotrypsin
The activation energy of a certain reaction is 40.8 kj/mol. At 20 degrees C , the rate constant is .0130 s^-1. At what temperature would this reaction go twice as fast
Using information in Appendices B and C, calculate the minimum number of grams of C3H8(g) that must be combusted to provide the energy necessary to convert 3.25 kg of H2O from its solid form at -11.0°C to its liquid form at 70.0°C.
A sample of potassium nitrate is collected in a 1500 mL flask. The pressure of the gas in the flask is 2.2 atm and the temperature is recorded to be 346.7K. How many molecules of O2 gas were produced
What is the initial concentration (in M) when 15.3 mL of a potassium hydroxide solution was diluted with 15.1 mL of solvent to a final concentration of 0.561 M? Assume the volumes are additive.
The reaction for the decomposition of dinitrogen monoxide gas to form an oxygen radical is: N2O--->N2 + O2. If the activation energy is 250 kj/mol and the frequency factor is 8.0 x 10^11 s^-1, what is the rate constant for the first order reaction..
The distribution constant for the metabolite between ligroin and an aqueous solution is 11.8. You extract 50.0 mL of an aqueous solution that is 0.0350 M in the metabolite with 25.0 mL ligroin. What is the concentration of the metabolite in the aq..
Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute.
Describe how you would construct your target electrochemical cell, including the identities and concentrations of all chemical species, as well as a diagram of the setup.
A hydrogen molecule in it's ground vibrational state with KE=10eV collides with heavy atom metal surface and no energy is transferred to the surface, i.e., the surface can be modeled as an infinite potential wall.
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