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In general, ionization energies increase across a period from left to right. Explain why the second ionization energy of Cr is higher, not lower, than that of Mn.
Calculate the compression ratio (final/ inital volume) required to raise the temperature of air, initally at 1 bar and 300K to 900K. What is the final pressure? Air can be considered an ideal gas with Cv = 5R/2 at all conditions of interest.
The heat of reaction for the combustion of cyclohexane, C6H12, is 936.8 kcal/mol. What is the heat of combustion for cyclohexane in kcal/gram?
a solution made from 6.50g of an unknown compound in 27.8g of diphenyl has a molality of .195m. Calculate the molar mass of the unknown.
Which of the following substances would have a standard enthalpy of formation equal to O kj/mol. Select all that apply
(R)-phenylalanine has a specific rotation of -70.0 degrees; (S)-phenylalanine has a specific rotation of +70.0 degrees. The optical activity of a sample of phenylalanine was measured, and a specific rotation of -56.0 was found. Which enantiomer i..
What is the mole fraction of solute and the molal concentration for an aqueous solution
what are the values of the entropy changes system surroundings and universe for the cooling of 1 mol of o2 g from 298 k
a solution is prepared by adding 8.28 grams of an unkown compound to 217 g of cyclohexane c6h12. this solution freezes
What was the wavelength of the second photon emitted?
100.0g of Cl2O7 are mixed with excess of water obtaining 136.0g of periodic acid according to the following reaction. Determine the percent yield of HClO4.
Calculate the pH of a 1.39x10^-2 M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86
Tests on human subjects along the East Coast of the United States in 1965 and 1966, following the era of atomic bomb testing, revealed quantities of about 1.71 pCi of plutonium radioactivity (alpha radiation) in a test subject. How many disintegra..
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