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A chemist titrates 100 ml. of .020 M aqueous ammonia solution with .10 M HCl at 25 degrees C. What is the pH of the solution after 20 ml of HCl have been added to the solution? Kb of NH3 is 1.76*10^-5
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Why is (NH 4 ) 2 CrO 4 a molecular compound if ionic is metal + nonmetal and molecular is nonmetal+nonmetal? The Cr is a metal and the NH4 and O4 are non metal so it is metal+non metal but why cant it be ionic instead o ...
Carbon-carbon single bonds in organic molecules have energies about350. kJ/mol. What is the corresponding wavelength? Could UV lamps(248 nm) be used to break these bonds?
A student finds that the mass of an object is 6.62 kg. She is told that her measurement has an error of 12.3%. What is the true mass (in kg) of the object?
1. 2Cr(OH) 3 + 3Br 2 + 10OH - 6Br - + 2CrO 4 2- + 8H 2 O In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. 2. A tank ...
Diagonal relationship and anomalous behaviour of the each element of the periodic table
For the molecule allene, H2 C = C = CH2, give the hybridization of each carbon atom. Will the hydrogen atoms be in the same plane or perpendicular planes?
What is the density in g/mL of a ball that has a mass of 22.1 ounces and a diameter of 2.04 inches? Will it float if placed in a bucket of water? The answer is "no." Please can you help me Provide the calculations to pro ...
Why would the fact that red blood cells are malformed cause a problem with their ability to carry oxygen? How would this affect a person stricken with this disease?
Insoluble PbBr2(s) precipitates when solutions of Pb(NO3)2(aq) and NaBr(aq) are mixed. Pb(NO3)2(aq) + 2NaBr(aq) ---> PbBr2(s) + 2NaNO3(aq) ΔrH = ? To measure the enthalpy change, 350. mL of 0.50 M Pb(NO3)2(aq) and 350. ...
A scuba diver creates a spherical bubble with a radius of 2.5 cm at a depth of 30.0 m where the total pressure (including atmospheric pressure) is 4.00 atm. What is the radius of the bubble when it reaches the surface of ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
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