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A skyscraper in Pittsburgh, built in the early 1970's is supported by water filled columns. Potassium carbonate was added to the water to prevent freezing during cold weather. If the solution is 40.0% K2CO3 by mass, what is the "ideal" freezing point of this solution in Celsius?
the values of Hfo given in kJ/mol, calculate the value of ?Go in kJ for the combustion of 1 mole of propane to form carbon dioxide and gaseous water at 298 K.
What volume (mL) of 0.663M potassium hydroxide aqueous solution is needed to neutralize [?this means to completely react with] 842 mL of 0.554M nitric acid?
A solution is composed of 1.00 mol cyclohexane (P cy=97.6 torr) and 2.20 acetone (P ac=229.5 torr). What is the total vapor pressure above this solution
an aqueous solution is 22.0 by mass silver nitrate agno3 and has a density of 1.22 gml. what is the molarity of silver
You wish to extract an organic compound from an aqueous phase into an organic layer (3 to 6 extractions with a separatory funnel). With regard to minimizing the number of transfer steps,
What amount of solid NaOH must be added to 1.0 L of a 0.15 M H2CO3 solution to produce a solution with [H+]=3.3*10^-11 M ? There is no significant volume change as the result of the addition of the solid.
A 2 mL solution containing 1.40 uCi/mL is injected into the blood stream of a patient. After dilution, a 1 mL sample is withdrawn and found to have an activity of 2.9 * 10-4uCi. Calculate the blood volume,
50.0 mL of Ba(OH)2 is titrated to the final equivalence point with 19.34 mL of 0.250 M H3PO4. What is the concentration of the original Ba(OH)2 solution
The concentration of urea (MW=60.0g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H2O
in the preparation of the esters given in this experiment the reaction product was extracted with 5 sodium bicarbonate
Determine how you would make a 100ppb solution of riboflavin from a 50mg/L stock solution. Do the same for preparation of a 500ppb solution from a 50mg/L stock solution
bone was dissolved in hydrochloric acid giving 50.0 ml of solution containing calcium chloride cacl2. to precipitate
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