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When 76.0 grams of calcium and 36.9 grams of nitrogen gas undergo a reaction that has a 90.0% yield what mass of calcium nitride is formed?
An air sample contains 0.032% CO2 (by mole). If the total pressure is 758mm Hg, what is the partial pressure of CO2
Calculate the pH during the titration of 20.00 mL of 0.1000 M ammonia NH3(aq), with 0.1000 M HCl after 20.30 mL of the acid have been added. Kb of ammonia = 1.8 x 10-5.
This leaves the aspartic acid amine group and the side chain carboxylic acid functional group of aspartic acid. Therefore aspartame will have an isoelectric point at a pH between the pKa values of these functional groups
Draw the skeletal structure of all the peptides you can make combining one of each of these amino acids. Show your products in the unionized state and omit any stereochemistry.
Predict that it was dissolved in HCl then mixed into the diethyl ether because diethyl ether is a base and since the benzoate contains an amine group they would remain unreactive with one another.
Passivation, Miscible, Button Battery, Solute, Galvanization A. Protecting a metal from corrosion by covering it with another metal with a more negative reduction potential.
A tripeptide made from the amino acids alanine, phenylalanine, and threonine is shown in this Jmol molecule. If the convention for naming peptides
Calculate the equilibrium constant for the chemical system described by the following chemical equation: 4 Al (s) + 6 Ni2+ (aq) 4 Al3+(aq) + 6 Ni(s) The 2+ and 3+ indicate charge. How do you calculate the Keq
A compound containing only C, H, and O, was extracted from the bark of a sassafras tree. The combustion of 91.3 mg produced 248 mg of CO2 and 50.8 mg of H20. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formu..
What role do the potassium chloride (KCl) and potassium sulfate (K2SO4) play in this experiment
The observed rotation of a solution of 1.3 g of a compound in 10 mL of water is +3.7 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound
Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 1.00-L metal bottle that contains air at 98K and 2.0 atm pressure is sealed off. If we inject 60.0 mL of liquid helium and allow the entire system to warm to room temperature
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