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A 16 ounce speciality coffee drink contains 254mg caffeine. If all the caffeine is extracted and dissolved in an equal amount of water, what is the pH of the solution? what is the percent ionization?
Solid aluminum reacts according to the balanced equation. If a total of 830 kJ of heat is produced in the reaction as written, how many moles of Al2S3 are produced?
The pH in the stomach of a certain animal is 3.8. This means that the hydrogen ion concentration in the stomach
Carbonic acid then ionizes in water (Ka1 = 4.5× 10-7). Ignoring Ka2, estimate K for the overall process by which CO2 and H2O form H and HCO3-.
What is the value of the rate constant for a reaction in which 75.0 percent of the compound in a given sample decomposes in 85.0 minutes. Assume first order kinetics.
How feed should be admitted when PFRs (plug flow reactor) are connected in parallel and Show graphically how to find conversion when MFRs (mixed flow reactor) of different sizes are connected in series
Diphosphorus pentoxide(3.54g)has reacted with ferric oxide(5.45g). What is/are the mass/masses of the product(s) obtained per reaction assuming 100% yield
Acetylene (C2H2) and a hydroxide can be made by reacting calcium carbide (CaC2) with water. a) write a balanced equation for the reaction. b) what is the maximum amount of heat (in joules) that can be obtained from the combustion of acetylene
A chemist needs a pH 3.5 buffer. Should she use NaOh with formic acid ( Ka =1.8x10-4exp.) or with aceticacid ( Ka = 1.8x10-5 exp)? Why. What os the disadvantage of choosing the other acid. What is the role of NaOH
a 45.0 g aluminum block initally at 28.0 celsius absorbs 825 joules of heat. what is the final temperature of the
the density of the solution is 1.41 g/mL at 25 degrees celcius. What is the molarity of nitric acid in this solution?
Balance the following formula unit equation. What is the sum of all of the coefficients. (Do not forget coefficients of one.) KMnO4 + H2O2 + H2SO4 ® O2 + MnSO4 + K2SO4 + H2O
calculate the final volume of a 0.500 l gas container that increased in temperature from twenty six degree celsius to
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