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A geochemist is interested in studying the extent of ocean dilution of trace components due to melting glaciers. If normal seawater has a pCa2+ of 5.611 and the projected effects of melting glaciers is a 2.50% change in concentration What is the final pCa2+? Briefly propose a way to measure the calcium concentration.
How are the opposing pathways of glycolysis and gluconeogenesis prevented from extensive futile cycling? a) The catabolic and anabolic pathways do not take place in the same part of the cell
calculate the amount of the impure sample one should weigh out on the analytical balance in order to titrate 25.00 mL of a 0.1000M solution of NaOH. Use dimensional analysis.
Calculate the radius of the metal atom. A hypothetical metal has a face-centered cubic unit cell with the edge length of 4.943 Å.
A 1.3 g sample of C3H6O is burned completely in excess oxygen to yield CO2 (g) and H2O (l) at 25 C, releasing 41.4 kJ of energy. What is the enthalpy of formation of C3H6O?
the pressure on a balloon holding 411 ml of an ideal gas is increased from 211 torr to 1.00 atm. what is the new
The first equivalence point for the titration of 0.2567 grams of a weak acid is reached when a volume of 26.80mL of 0.0510 M NaOH(aq) has been added. What is the molar mass of the acid?
A set of data gave an average unpopped kernel of 0.12 grams. How many kernels are in a pound of unpopped corn?
The alcohol content of hard liquor is normally given in terms of the "proof," which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 81-proof gin. The density o..
Determine the pH of a solution with .12M of sodium acetate at 25 degrees C. Ka=1.8x10^-5
A 0.300 M solution of an acid, HZ, has a pH = 1.301. What is the value of the ionization constant, Ka, for this acid?
treatment of .25g sample of impure potassium chloride with excess AgNO3 resulted in formation of .2912g AgCl. Calculate the % of KCl in the sample.
A 80.0 mL volume of 0.25 M HBr is titrated with 0.50 M KOH. Calculate the pH after addition of 40.0 mL of KOH.
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