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A hypothetical weak acid, HA, ws combined wih NaOH in he following proporions: .2 mol of HA, .08 ml of NaOH. The mixture was diluted o a total volume of 1.0 L and the pH measured. a) if pH= 4.80, what is the pKa of the acid? b) How many moles of NaOH shold be added to the solution to increase the pH to 5.00?
If the 3d and 4s bands overlap in a metal atom, what is the maximum number of electrons for this composite band
The gas pressure in an aerosol can is 1.8 atm at 25 degrees celsius. if the gas is an ideal gas what pressure would develop in the can if it were heated to 475 degrees celsius?
concentration was dissolved in HCl and diluted to 100.0 mL. Aliquots of 10.00 mL of this unknown solution were added to different volumes of a 2.08 ÃŽ¼g/mL Ca standard solution and diluted to 200.0 mL. Find the weight percent of Ca in the rock sam..
Using 1-butanol as the only organic starting material, write out a series of reactions that will produce this molecule:
A 32.5 mL sample of NaOH solution was titrated with 64.23 mL of a 1.25 M HCl solution to the equivalence point. What is the molarity of the NaOH
The rate constant for the decomposition of dinitrogen pentoxide to form nitrogen dioxide and oxygen gas has the rate constant 1.7 x 10-3 s-1. This is a first order reaction. How long would it take for for the reaction to be 39.00% to complete
prepared by dissolving 0.798 g of acetic acid in 500 ml of water solution, what is the osmotic pressure, in mmHg at 25 degrees Celsius?
Carbon tetrachloride may react with oxygen to produce chlorine and carbonyl chloride.2CCl4(g) + O2(g) 2COCl2(g) + 2Cl2(g); Kc = 9.9 × 1051What is Kc for the following equilibrium?COCl2(g) + Cl2(g) CCl4(g) + ½O2(g)
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. Calculate the molar concentration of Cl- in this solution.
The dipole moment of HI is 0.42D . What is the dipole moment of HI in C.m. Express your answer in Coulomb-meters to three significant figures.
what is the energy of a photon emitted from an electron in a hydrogen atom when it jumps from the n 7 to the n 3
Consider a stoppered flask containing benzene, iodine, and air, which has reached equilibrium at 298K. Which one of the following statements concerning the system at equilibrium is true?
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