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Calculate the concentrations of acetic acid and sodium acetate necessary to produce a pH 5.5 solution that is 0.5 M in total acetate concentration.
calculate the fraction of methyl isonitrile molecules that have an energy of 160.0 kj or greater at 510k and 514 k.
the dehydration of beta-hydroxy ketone occur so readily to produce the alkene compared with all the unsuccessful effort to dehydrate an alcohol under basic conditions?
35.0 grams of an unknown sugar was dissolved in water and the final volume of the solution was brought up to 1.00 L. The osmotic pressure of this solution was determined to be 2.50 atm at 25°C. Which of the sugars below was most likely the unknown..
List the following gas phase ion pairs in order of the quantity of energy released when they form from separated gas-phase ions. Start with the pair that releases the least energy.
calculate the ph of buffer solution made from .20 M HC2H3O2 and .050 M C2H3O2 that has an acid dissociation constant for HC2H3O2 of 1.8*10-5.
Consider the Bohr model of the hydrogen atom. What would the visible emission spectrum of hydrogen look like if electrons transitioned from a higher orbit to a lower orbit by way of slowly falling into the lower orbit over time while releasing ene..
an oxygen-oxygen bond has an enthalpy of 498 kj/mol , and the standard enthalpy of formation of CIO2(g) is DH f=102.5 kj/mol , use Hess's law to calculate the value for the enthalpy of formation of CIO (g)
A solution of butanoic acid is prepared from 0.067 mol of butanoic acid in sufficient water to give 1.0 L of solution and has a pH of 2.72. Determine the Ka for the butanoic acid solution
What total volume of gas forms if it is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 753{\rm mmHg} ? of a 12.5g of Ag(s) 2g2O(s)-> 4Ag(s) + O2
Calculate the number of molesof each reactant. Determine the limiting reactant in each of the following three reactions. The limiting reactant that you determine here will be used directly in this experiment.
What is ?H in kJ for the combustion of 2.86 L of benzene producing CO2(g) and H2O? Assume that the heat of combustion of benzene is -4.18 x 103 kJ/mol. Enter your answer with three significant figures in exponential format (1.23 x 104 = 1.23E4).
A metal sample weighing 40.0 g and at a temperature of 99.1 C was placed in 38.6 g of water in a calorimeter at 25.0 C. The calorimeter reached a maximum temperature of 32.8 C.
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