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A solution is prepared by dissolving 12.9 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 15.00 mL sample of this stock solution is added to 53.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.
Give explanation why the boiling point of a 2-component mixture increase slowly throughout a simple distillation while the boiling point differences are not large?
A 27.0-g sample of water at 250. K is mixed with 47.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Determine the calculated pH of the solution if initially there is 2.0mL of CH3COOH at an initial concentration of 0.89M and 0.80mL of 1.0M Hydrochloric Acid is combined.
Assuming the structures above gave molecular ion abundances of 12, 70, and 23(dexchlorpheniramine, 9-aminoacridine and pilocarpine, respectively), what abundances would you expect for the M+1 and the M+2 peaks for each structure?
Using a solution of KMnO 4 has a percent transmittance of 27.3 percent when observed in a 1.15-cm cell at a wavelength of 525 nm. Compute the absorbance of this solution.
16.57 The complex [Ni(NH3)6]2+ has a ligand field splitting of 209 kJ·mol-1 and forms a purple solution. What is the wavelength and color of the absorbed light.
Synthesizing ethers via acid-catalyzed condensation reactions has limited usefulness. The conditions (sulfuric acid and heat) are also conducive to elimination products. Clarification of Organic Chemistry
How much heat is required to take a 15.0 g sample of ice with an initial temperature of 0.00oC and raise it to a final temperature of 75.0 oC.
Vitamin b6 is needed in the metabolism of amino acids. When it binds to an enzyme it forms a complex with the e-amino group of lysine, which is a primary amine.
An impure sample of sodium carbonate, (Na2CO3) is allowed to react by dissolving it in an aqueous solution of 0.134 M HCl, according to the following reaction:
When making an alcoholic beverage, such as beer and wine, Brix is a measurement used to assess the amount of sugar present in the fermentation matrix or grape juice.
If 95 0C of heat are added to a pure gold coin with a mass of 20 gm, what is its temperature change? Specific heat capacity of gold is 0.128 .
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