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In an acid-base titration 14.7 mL of .107M NaOH (aq) sodium hydroxide is needed to react to an end point with .1252 grams of H2C2O4 oxalic acid. Determine the molarity of the aqueous sodium hydroxide solution. 2NaOH + H2C2O4 ----> 2HOH + Na2C2O4
What is the pH of an aqueous solution with a hydrogen ion concentration of [H ] = 1.6 × 10-9 M? b) What is the hydroxide ion concentration, [OH-], in an aqueous solution with a hydrogen ion concentration of [H ] = 1.6 × 10-9 M?
A 643 mL gas sample at STP is compressed to a volume of 285 mL, and the temperature is increased to 26C. What is the new pressure of the gas in Pa? Answer in units of Pa.
Calculate the mass percent of a solution that is prepared by adding 40.0 g of rm NaOH to 408 g of {rm H_2O}.
What is the equilibrium concentration of SCN if the Kc=400 for the following reaction at equilibrium if the [Fe3+]=2.00E-3 M and FeSCN 2+ = 4.00E-1M
provide reaction mechanisms for the formation of each of these byproducts and specify whether the mechanisms you write are SN1, SN2, E1, E2, or none of these. explain why you would expect bisulfate to be a good leaving group for substitution or eli..
In aqueous solution, the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule?
How much energy would be absorbed or re- leased by the H2O in the process 30 grams H2O(g) at 100?C → 30 grams H2O(l) at 20?C.
Do these lambda maxs indicate an increase or a decrease in the energy of the light absorbed as the number of EN ligands bound to Cu(II) increases
A 128.2mL sample of 0.15M solution of H3PO4 is titrated with 0.18M NaOH. What volume of base must be added to reach the third equivalence point
calculate the approximate concentration of the solution in mol/kg and determine the volume change of the ballon when it ascends from 1 atm pressure to 240 torr pressure ?
A solution of lactic acid, HC3H5O3, on a laboratory shelf was of undetermined concentraton. If the pH of the solution was found to be 2.51, what was the concentration of the lactid acid?
Consider 1 mole each of gaseous He and N2 at the same temperature and pressure. The diameter of N2 is 1.7 times that of He. State which gas (if any) has the greater value for: a) ; b) crms; c) average translational energy ; d) Z1; e) Z11; f) de..
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