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Compute the weight of KClO3 that would be necessary to produce 39.52 liters of oxygen measured at 227C and 720. torr. 2KClO3(s)--->(heat)---> 2KCl(s) + 3O2(g)
how many grams of dry nh4cl need to be added to 1.60 l of a 0.800 it m solution of ammonia nh3 to prepare a buffer
How many grams of sodium lactate should be added to 1.00 L of 0.150 lactic acid ( or ) to form a buffer solution with = 4.10? Assume that no volume change occurs when the sodium lactate is added.
How many additional milliliters of titrant are needed to reach the first equivalence point of quinidine dihydrochloride. What is the pH at the first equivalent point
Determine the following characteristics of the titration curve for 25.0 mL of 0.400 M NH3(aq) titrated with 0.335 M HI(aq). (For NH3, Kb = 1.8x10-5.) Enter scientific notation as 1.23E4.
Identify the limiting reagent for the given combination of reactants. Calculate how many grams of whatever substance will be in excess and how many grams of HF will be made.
What is the alkalinity of the river, What concentration of acid, for example, HCl, would result in a pH of 7.5
Electrical conductivity measurements show that 0.050 M acetic acid is 1.9% dissociated at 25* C. Calculate pKa and Ka for acetic acid.
radioactive gold-198 is used in the diagnosis of liver problems. the half life of this isotope is 2.7 days. if you
If 3.50 g of H2S are used in the above reaction, what will be the theoretical yield of water in grams?
Explain the distance between layers in a crystal is 342 pm. X rays are diffracted from these layers at an angle of 32.4°. Presuming that n = 4, compute the wavelength of the X rays in nm.
The total pressure for a mixture of N2O4 and NO2 is 1.5 atm. If Kp=7.1 (at 25 degrees C) calculate the partial pressure of each gas in the mixture. 2NO2(g) N2O4(g)
Write a balanced half-reaction for the oxidation of chromium ion (Cr^3+) to dichromate ion (Cr2O7^2) in acidic aqueous solution. Be sure to add physical state symbols where appropriate
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