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What is the pH halfway to the equivalence point for the titration of 0.20 M CH3NH2 with 0.20 M HCl? (Kb of CH3NH2 = 4.4 x 10-4)
a. 10.6
b. 3.4
c. 9.3
d. 4.7
e. 7.0
What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+NaOH(aq)==>H2O(l)+NaClO4(aq)
Propose a reasonable reaction mechanism for the sodium hypochlorite oxidation of 3-heptanol. Give the IUPAC name of the expected product. What other oxidizing agents may be used to carry out this oxidation
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
Ethylene glycol, HOCH2CH2OH, is effective as an antifreeze, but it also raises the boiling temperature of automobile coolant, which helps prevent loss of coolant when the weather is hot. a. What is the freezing point of a 50.0% solution of ethylen..
the balanced chemeical equation for the reaction of magnesium metal in oxygen gas and for the rection of magnesium metal in nitrogen gas
Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere.
Calculate the molarity of a solution made by dissolving 0.0715 mol Na2SO4 in enough water to form 550 mL of solution.
The water bath conatins 2.90 kg of water at 27.6 degrees celcuis. During the reaction 110 kj of heat flows out of the flask into the bath. Calculate the new temperature of the water bath
You have a solution of sodium nitrate containing 140g at 65 degrees Celsius. Is the solution saturated, unsaturated, or supersaturated.
Calculate the solubility (in M units) of ammonia gas in water at 298K and a partial pressure of 6.50bar . The Henry's law constant for ammonia gas at 298K is 58.0 M/atm
Use a combination of balanced chemical equations and their K's to calculate the equilibrium constant for the titration of formic acid with NaOH, which you used in the previous question. (Hint: You will need to include the value of Kw at some point..
Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of carbon-11 is administered to a patient for a PET scan, what percentage of carbon-11 will remain in the patient's system after 61.2 min
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