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What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.67 M (Kb for CH3NH2 = 4.4 x 10-4). For this problem, include the correct units of M.
Consider the following reaction for the dissociation of benzoic acid (MW=122 g x mol^-1) in water where Ka for benzoic acid is 6.5 x 10^-5. C6H5COOH(aq) + H2O (l) C6H5COO-(aq) + H30+(aq)
Does the type of fat used to make soap result in soap with different properties. What is the best choice of fat to use and why
reaction begins only after a collision between the reactants. So this is an endothermic reaction, and most reactions occur when two reactants collide with each other.
Pure solid NaH2PO4 is dissolved in distilled water, making 100.0ml of solution. 10 ml of this solution is diluted to 100.00 ml to prepare the orignal phosphare standard solution
The next most abundent isotope is 26Mg, relative atomic mass 25.98259. The third Isotope is 25Mg whose natural abundance is in the ratio of 0.9083 to that of 26Mg. What is the relative atomic mass of 25Mg?
An aqueous antifreeze solution is 55.5% ethylene glycol by mass. the density of the solution is 1.071 g/cm3. calculate the molality. calculate the molarity. calculate the mole fraction.
phenol (respectively pKa 4.75 and 9.95), What is the principle species present at pH values 3, 5, 7, and 11?
What types of intermolecular forces would you expect to exist among molecules of 1-butanol? (Select all that apply.)
Organic chemists rely heavily on the spectroscopic methods of IR and NMR. Explain in great detail why the two methods have to be used in tandem to
How many Pb atoms would be present in a 0.500 L sample of this air (the approximate lung capacity of a human adult)?
When a substance is heated it glows and emits a certain amount of radiant energy that corresponds to particular energies in the electromagnetic spectrum.
If the concentration of mercury in the water of a polluted lake is 0.375 ug (micrograms) per liter of water, what is the total mass of mercury in the lake, in kilograms, if the lake has a surface area of 14.65 square miles and an avery depth of 35..
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