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If a 10.00mL sample of unknown concentration of HF is titrated with 28.94mL of 0.1040M NaOH, what is the concentration of HF?
Calcium phosphide is used to make fireworks. Write a conversion factor that converts between moles of calcium ions in calcium phosphide, Ca3P2, and moles of Ca3P2.
Calculate the mass of ammonia formed when 6 g of hydrogen react with 14 g of nitrogen to form ammonia. You may use whole numbers for atomic masses.
Calculate the number of moles of cytochrome c3+ (Fe3+) formed from cytochrome c2+ (Fe2+) with the Gibbs energy derived from the oxidation of 1 mole of glucose
Calculate the change in Gibbs free energy for each of the following sets of delta H, delta S and T. Predict whether or not the reaction will be spontaneous at temperature indicated.
Explain what happens to the atomic number of a nucleus when positron emission occurs
The heat of combustion of naphthalene (C10H8) is - 5157 kJ/mol. Using these data and data in Appendix C, calculate the heat of hydrogenation of naphthalene.
design a molecule with three chiral centers and draw eight possible stereoisomers of the molecule.
Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90º bond angle in it.
A sample of pure (1 chloroethyl) benzene had a specific rotation of 87.2 degrees, while pure R 1 chloro-1-phenyl ethane has a specific rotation of -109 degrees. This sample was reacted with excess ammonia in diethyl ether at 0 c.
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3.at this temperature, 0.400 mol of H2 and 0.400 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at equilibrium
Eight electrons can freely move in a box whose dimensions are 4m x 1m x 1m. sketch the occupied energy states and write the equation of the degenerated energies, including the quantum numbers, from the occupied states.
How many grams of oxygen are collected in a reaction where 265mL of oxygen gas is collected over water at a temperature of 25 degrees celcius and a total pressure of 696 torr
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