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The pH of a solution containing equal concentrations of a weak acid and its salt is found to be 5.1. What is the Ka for this acid
Find the theoretical yield and the percent yield if the mass of aluminum is 0.509 and the mass of alum synthesized is 4.99 g
A circular colony of mold with diameter of 4.8 cm and density of 0.0023 g/cm2 what is the mass of object
what two steps in the reaction are accelerated by the presence of strong acid, and what function does the acid play in each of these steps
curved arrows to symbolize the flow of electrons, white the stepwise mechanism for the acid-catalyzed esterification of p-aminobenzoic acid to ethyl p-aminobenzoate
a)white the mathematical expression for the equilibrum constant,keq,as a function of the concentrations of the products and reactants for this reaction b)provide two specific ways whereby the le cha
If the initial pressure of the ether is 135 torr, what is its partial pressure after 1420 s? (Note, since the volume and temperature don't change, the pressure is directly related to number of moles
The initial rate of a reaction 2A + 3B -> C + 2D was measured using different initial concentrations of A and B. Calculate the value of k
Sketch the reaction profile for an exothermic reaction of 25 kJ/mol with an activation energy of 55 kJ/mol. (Be sure to label the transition state on the diagram and include quantitative data.)
The initial rate of a reaction 2A + 3B -> C + 2D was measured using different initial concentrations of A and B. Use the information in the table to determine the rate law for the reaction.
2 O3 (g) ? 3 O2 (g) (rate expression) <----may not be relevant. A proposed mechanism for the reaction has the following elementary steps
If the rate of appearance of oxygen (?[O2]/?t) is 6.0 x 10-5 M/s at a particular instant, what is the value of the rate of appearance of ozone (-?[O3]/?t) at this same time
Assuming that the limits of the visible spectrum are approximately 380-700nm, find the angular range of the first-order and second-order visible spectrum produced by a plane grating that has 900 gro
How is the rate of disappearance of ozone related to the rate of appearance of oxygen in the following equation: 2 O3 (g) ? 3 O2 (g) (rate expression)
How many valence electrons are there in a Cr atom, Which of the following 1M solutions will have the highest concentration of ions
The Ksp for BaCO3 is 5.0 x 10-9. What is the molarity of a saturated aqueous solution of BaCO3
A current of 5.64 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 8.80 g of nickel
Predict whether the following salts, when dissolved in water; produce acidic, basic, or neutral solutions:
Draw a molecule that will produce a spectrum containing two triplets appearing at different chemical shifts and both having an integral of 2 hydrogens.c
Write the structures for all the aldol condensation products you expect from the cross aldol condensation of 4-methyl benzaldehyde and 2-butanone (methyl ethyl ketone)
The organic solvent pyridine, C5H5N (aq) is a base with a strong irritating odor. Calculate the pH of a 0.300 M aqueous solution of PYRIDINe at 25 degrees Celcius.
Calculate the pH and the concentration of the other species in a 0.0200-M aqueous solution of C6H5COOH (aq)
Derive an expression for the number of molecules with a speed (c) greater than some specified speed (c'). Recall that the number of molecules having speed in a certain range is the integral