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The half-life of Chromium-51 is 28 days. Starting with an original sample size of 12.0 ?g, calculate the number of days it will take for the radioactive isotope to drop to 3.00 ?g.
Calculate the equilibrium molar concentrations of Hg2+ and SCN- in a solution prepared by mixing 10 mL of 0.0200 M Hg2+ with 10 mL of 0.0200 M SCN
Compute the free energy of hydrolysis of Adenosine Tri Phosphate in a rat liver cell in which the ATP, ADP and Pi concentration
How many grams of oxygen are collected in a reaction where 222 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
On treatment of Compound D with an alcoholic solution of silver ammonium hydroxide, a silver mirror was formed within a few minutes. Identify the hydrocarbon A and Compounds B-D.
Calculate the pH at the equivalence point for the titration of 0.230 M methylamine (CH3NH2) with 0.230 M HCl.
An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium cromate, Na2CrO4, resulting in the formation of a percipitate of lead chromate.
a 40 gram sample of water at 25 degrees celcius absorbs 500 joules of energy. what is the final temperature of the water? the specific heat of water is 4.18 joules/g degrees C.
degrees Celsius to a final volume of 34.6 L. During the expansion the gas cools to 12.0 degrees celsius. what is the final pressure?
Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant isotopes
the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule?
If Kp = 0.032 at this temperature, what will be the equilibrium overall pressure starting from pure CaSO4(s)?
How many grams of ethylene glycol (automobile antifreeze, C2H6O2) dissolved in 3.55kg of water is needed to lower the freezing point
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