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A 16 ounce specialty coffee drink contains 216 mg 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?
The structure of biphenyl and the numbering scheme used in naming its derivatives are indicated below. What is the major product obtained on dinitration of biphenyl (HNO3, H2SO4)
the most common source of copper rm cu is the mineral chalcopyrite rm cufes2. how many kilograms of chalcopyrite must
a melting point determination of vanillin melting point 80 c was made with a heating apparatus setting at the maximum
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 of nitrogen and 4.05 of oxygen emperical formula
If there are initially 7.21 grams of the compound dissolved in 110.0 mL of water, how many grams will remain in the aqueous layer after extraction with one 30.0 mL portion of ether?
a solution initially 0.100 m in hocl and 0.300 m in naocl. what is the ph in 0.030 mol of solid naoh is added to 1.00 l
a) decreasing the volume of a gas b) melting a solid c) chemical reactions that increase the number of moles of gas d) forming mixtures from pure substances e)increasing the temperature of a gas
Suppose buffer #1 is prepared using 40.0 mL 0.1 M HC3H5O3 and 60.0 mL 0.1 M C3H5O3- to give a final volume of 100.0 mL. What is the pH of this buffer
One mole of sucrose weighs 342.3 grams. 1mol=6.02*10^23 molecules. Dietary fats (typically 18-20 carbons) contain about 9 dietary calories per gram. Assume all food consumed goes to making ATP
Which best describes a solid?
A student following the procedure described in this module collected the foll wing data: Mass Mg, m= 0.0243, initial syringe volume, ml=1.0, final syringe volume,ml= 26.5, barometric pressure, torr= 754, temperature,k= 298. Calculate the gas law c..
A sample of (S)-2-butanol has an observed rotation of +1.03°. The measurement was made with a 1.0 M solution of (S)-2-butanol in a sample container that is 10 cm long. What is the specific rotation [?]D, for (S)-2-butanol
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