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Two chemicals, A and B are combined forming chemical C. The rate of the reaction is mutually proportional to the amounts of A and B not yet converted to C. Primarily there are 200 grams of A and 300 grams of B and during the reaction, for each gram of A used up in the conversion there are three grams of B used up. An experiment illustrate that 75 grams of C are produced in the first ten minutes. After a long period of time how much of A and of B remains as well as how much of C has been produced?
A 147 gram piece of metal has a density of 7.00 g/mL. A 50 mL graduated cylinder contains 20.0vmL of water. What is the final volume after the metal is added to the graduated cylinder?
Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 200.0 mL of 0.12 M NH3. The Kb for NH3 is 1.8 x 10-5.
The Heisenberg uncertainty principle also holds for energy and time, two complimentary variables. How well can we know the energy of molecular excited states with lifetimes of a)10 micro seconds; b) 10 ns and c) 10 ps.
Find the PH of the final mixture when a solution containing two weak acids, i.e., 4mM ethylene (Kb1=4.72x10-4) and 2mM ethylene (Kb2=10-4) is titrated with twice its volume of 3mM HCL
Calculate the pH in the cathode compartment if the cell emf = 0.67 V when PNO = 1.00 atm, [Sn4+] = 0.10 M, [NO3-] = 0.010 M, and [Sn2+] = 0.020 M
What is temperature of boiling water in Denver (in?C) at an elevation of 6000 ft ? 2000 m given that atmospheric pressure at that altitude is about 0.8 atm?
A fossil was analyzed and determined to have a carbon-14 level that is 22.0% that of living organisms. How old is the fossil
the osmotic pressure of this solution was 0.00222 atm at 25 C. calculate the molar mass of hemoglobin, which is a molecular compound and a nonelectrolyte.
A 24.9 mL volule of nitric acid reacts completely with 55.0 mL of aqueous sodium sulfide. The Reaction is 2 HNO3 (aq) + Na2S (aq) --> H2S (g) + 2 NaNO3 (aq) The volume of H2S(g) formed is 141 mL at 27*C and 735 mmHg. Determine the molarity of the n..
How many molecules of carbon dioxide are produced from the combustion of one molecule of propane (C3H8)
An experiment shows that a 248mL gas sample has a mass of 0.433g at a pressure of 745 mmHg and a temperature of 28 degrees C. What is the molar mass of the gas
Show the products of the reactions of these carboxylic acid with PBr3/Br2 before and after hydrolysis. a) Pentanoic acid
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