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The heat of formation of KCl(s) is -436.7 kJ/mol and the heat of formation of KCl(aq, 1 m) is -419.5 kJ/mol. Determine the heat of solution of KCl?
Calculate deltaG for this reaction at 298K in kJ. What can be said about the spontaneity of the reaction at 298K? (1) spontaneous in the reverse direction
Calculate the change in internal energy of the gas in each case of these processes.
A NaOH soln of unknown concentration was standardized against KHP. It took 45.78 mL of NaOH soln to completely titrate 1.256 g of KHP. Cal the molarity of NaOH.
Five metal rods (Copper, Iron, Nickel, Tin and Zinc), at room temperature, of equal mass are place in a 100 oC water bath. Which metal will reach 80 oC first.
how do you calculate the number of equivalents of NaOH required to reach the equivalence point?
a chemical reaction produced .311 g sample of gas which occupied 225 mL at 55 degrees C exerting a pressure of 86 mm Hg. what is the molar mass of the gas?
if you have 370 ml of water at 25 degrees Celcius and 130mL of water at 95 degrees C. what is the final temperatue of the mixture?
In a glass if you are take 1.0 ml of a solution of HCl with a pH of 4.0 and add it to 9.0 ml of distilled water, what would be the pH of the final solution
What two properties of ATP make it ideally useful for a form of energy storage in cells? Describe why the hydrolysis of ATP is highly exergonic (give at least two reasons).
Cobalt-60 is a beta emitter with a half life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 12.0 years?
Dissolving 3.00 g of an impure sample of CaCO3 in an excess of HCl acid produced .656 L of CO2 (measured at 20 degrees C and 792 mmHg). calculate the percent by mass of calcium carbonate in the sample. State any assumptions.
Based on the solubility rules, which one of these is insoluble in water?
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