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1) Explain why heat change at constant pressure and constant volume have definite values.explain the terms exothermic endothermic and heat of reaction.
2) State the Hess's law. illustrate the use of this law.
Calculate the pH of a solution that is .15 M Na2HPO4(aq) and .44 M Na3PO4(aq). Not sure how to solve it. The ka1 of H3PO4 is 7.6 x 10^-3, pKa1 is 2.12, ka2 is 6.2 x 10^-8, pka2 is 7.21, ka3 is 2.1 x 10^-13, pka3 is 12.68.
Calculate the solubility product constant for Pb(IO3)2 (4.3 x 10^-5 M), given that the molar concentration of saturated solution is as indicated in parenthesis.
How much heat is required to heat 10.0g of ice at -5.00 degree Celsius to become water vapor at 107.00 degree Celsius.
Write the structure for the pyrrolidine enamine and for the imine of cyclohexane. Write a balanced equation for the acid-catalyzed hydrolysis of each of these compounds.
determined the limiting reactant and the theoretical yield (in g) of nitrogen that can be formed from 24.0 g N2O4 and 23.5 g N2H4 molar masses are as follows: n2o4 92.02 n2h4 32.05
At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) reverse reaction arrow 2 SO3(g) What is the value of K at this temperature?
Write chemical equations showing how each of the following weak bases ionizes water to form OH-. With NH3
The density of a given solid and liquid of molar mass 147.2 g/mol at its normal melting temperature of 372.54 K are 992.6 Kg m-3 and 933.4 Kg m-3, respectively. If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K..
The amount of nitrogen in an organic subsxtance can be determined by an anlytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia.
What is the area of the circuit element in cm^2? Write your answer in scientific notation. Round your answer to 3significant digits.
Include activity coefficients in your solubility-product expression. The Ksp of Hg2I2 is 4.6× 10-29.
Determine the vibrational modes that are optically active and determine which are Raman and IR active for CCl4, CHCl3 and CDCl3
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