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A reaction has an activation energy of 32 kj/mol. If the temperature of the reaction doubles from 45 to 90 degrees by what factor will the ratio of the rate constants, k2/k1,change
Osmosis occurs when the solvent molecules move from a solution of higher solute concentration to a solution of lower solute concentration.
degree cl the initial concerntration of the three gases are 0.270M h2s,0.270 h2 and 0.135 s2. determine the equilibrium concentrations of the three gases
A gas at 30 degrees C and 600 mmHg occupies a volume of 412 cm^3. What is the volume in cm^3 that the gas will occupy if the temperature is lowered to -30 degrees C at the same pressure
If the Km of the above enzyme is 12 mM, calculate the substrate concentration needed to achieve 40% of maximal velocity. Then what fraction of active sites are filled at 40% maximal velocity
A 64gram piece of ice at 0 celsius is added to a sample of water at 9 celsius. All of the ice melts and the temperature of the water decreases to 0 celsius. how many grams of water were in the sample?
Sodium hypochlorite is a common ingredient in household bleach. What is the pH of this bleach if it contains 5% NaOCl by mass? (pKa of HOCl = 7.46)
Which of the following are true statements ?
Calculate the heat evolved in kilojoules by the formation of the solution. Calculate the heat evoled per mole of sulfuric acid. Use n(changeH) = -(mCchangeT)
An unknown element crystallizes in a body-center cubic crystal structure. The atomic radius of the substance is 2.532 Å and its density is 1.208 g/cm3.
particular amino acid in an ion exchange chromatography column. What is the peak width after the amino acid has migrated 100 cm?
The element bromine was first prepared by oxidation of aqueous potassium bromide with solid manganese(IV) oxide. Write a balanced net ionic equation for the reaction in aqueous acidic solution
Why are acidic substituents on the aromatic rings helpful in conducting the suzuki coupling reaction in water?
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