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Compute the pH concentrations of all species present (H2CO3, HCO3-, CO32-, H30+, AND OH-) in a 0.020 M carbonic acid solution.
A solution containing the two compounds exhibits absorbances (using a 1.00cm cell) of 0.726 and 0.544 at 267 and 312nm, respectively. What are the concentrations of A and B in mg/mL? Note: The aborptivity values are given in units of L/g.cm.
A 17 mL sample of a solution of Li2S was diluted with water to 79 mL. A 60 mL sample of the dilute solution was found to contain 1.3 M Li+. What was the concentration of Li2S in the original undiluted solution
When 9 mL of a solution containing 2.5 M AlBr3 is diluted to 33 mL, a dilute solution is formed. What is the Br- concentration in 20 mL of the dilute solution.
Does the molar solubility of lead(II) iodide increase, decrease, or remain the same with the addition of potassium iodide to the solution? Explain
the atomic weight of a newly discovered element is 98.225 amu. it has two naturally occuring isotopes. one isotope has
500cm3 of 0.250M of Na2SO4 is added to an aqueous solution of 15.0g of BaCl2 resulting in a white precipitate of insoluble BaSO4.
essential to prevent uncontrolled raise of the rate of chain reaction in the nuclear power plant. Can you try to find additional information how rate of chain reaction
In writing a lab report, a hypothesis is needed. The experiment called for a titration HCl solution of unknown molarity with TRIS base. Bromocresol green was used as an indicator.
A solution is prepared by disolving 0.60 g of nicotine (a nonelectrolyte) in water to make 12 ml of solution. The osmotic pressure of the solution is 7.55 atm at 25 celcius. The molecular weight of nicotine is HOW MANY g/mol
A 100.0-g sample of water at 27.0 oC is poured into a 77.4-g sample of water at 89.0 oC.What will be the final temperature of the water?
hydrazine derivatives are commonly used in rocket fuels. combustion of n2h4 produces n2g and h2og. when 1.00 g of n2h4
What are the differences between sub-energy levels and orbitals? (My professor said they were different.)
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