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calculate the minimum number of grams of propane,C3H8 , that must be combusted to provide the energy necessary to convert 5.00 kg of ice at -15.5 degrees Celsius to liquid water at 78.0 degrees Celsius.
Using graphical techniques, calculate the equilibrium pH and the equilibrium concentrations of all the dissolved species for a 10^-3 M (NH4)2CO3 solution.
What prefix is used to name a hydrocarbon with two carbon atoms?
What is the relationship between K and Kc?
write the balanced chemical equation and corresponding equilibrium expression for the each step in the ionization of phosphoric acid ( apolyprotic acid ) in water?
How many moecules of N2 are needed to react with 30 molecules of H2?
A solution containing an unknown quantity of A plus 930 nM B gave a relative detector response (peak area of A)/(peak area of B) = 1.21. Find the concentration of A in the unknown.
A 4.50-g sample of LIL at 25.oC dissolves in 25.0 mL of water also at 25.0C. The final equilibrium temperature of the resulting solution is 60.8C. What is the enthalp of solution of LICL expressed in kilojoules per mole?
Starting with 2-methyl-1,3-cyclohexanedione and other appropriate reagents, provide a mechanism for a Robinson annulation reaction.
Consider a solution of a weak acid at a pH equal to its pKa. By how much would the pH change, and in which direction, if we added to this solution enough base to neutralize 10% of the total acid?
Consider the following reactions carried out at a constant temperature and pressure. In which of these will the amount of work done be positive, only the coefficients of the reactants are given. All species are gas unless otherwise noted.
A reaction at 25C is known to standard changes in free energy, enthalpy and entropy of -38.4 kJ/mol.96.3kJ/mol
What mass of oxygen gas, measured at STP, is required in order to release 8300 kJ of heat to the surroundings from the combustion reaction shown
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