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The p-dinitrobenzene radical anion can be prepared by reduction of p-dinitrobenzene. The radical anion has two equivalent N nuclei (I=1) and four equivalent protons. Predict the form of the EPR spectrum using a(N)=0.148 mT and a(H) = 0.112 mT.
Show the bond angles which are at least slightly different that are shown by the H2CCBr2 molecule.
The bond energy of hydrogen is 51 kJ/mol (0.52 eV/molecule). Based on this information, how much energy should be required to break all of the hydrogen bonds in one gram of ice, thus separating the H2O molecules into independent units. Give answer..
the mass of the flask is measured when the outside of the flask is wet. outside of the flask is dried before the mass
Convert a concentration of 4x10-4 M to millimol per milliliter. List the two types of co-factors required by certain enzymes.
The following equilibrium pressures were observed at a certain temperature for the reaction. N2(g) + 3 H2(g) 2 NH3(g) PNH3 = 3.1 10-2 atm PN2 = 8.5 10-1 atm PH2 = 3.1 10-3 atm a)Calculate the value for the equilibrium constant Kp at this temperatu..
Consider the titration of 100.0 mL of 0.100 M HNO3 by 0.200 M NaOH.Calculate the pH after 34.5 mL of NaOH has been added.At what volume (in mL) of NaOH added does the pH of the resulting solution equal 7.00.
1. What is the ph of a solution that results from adding 250 ml of .50 m naoh to 750 ml of .50 m hf? 2. What is the ph of a buffer composed of .035 m h2po4 and .65 m hpo4?
In the formation of smog, nitrogen and oxygen gas react to form nitrogen dioxide. How many grams of NO2 will be produced when 2.0L of nitrogen at 840 mmHg and 24°C are completely reacted
Kevlar is a strong synthetic fiber used in bullet proof vests and body armor. Kevlar is made by the condensation reaction between 1,4-phenylene-diamine and terephthaloyl chloride. Modify the monomers below to create one repeat unit of the polymer.
A sample of aspirin to be purified has a mass of 1.0g. Aspirin has a solubility of 1.0g in 30ml of water at 37Celcius and a solubilty if 0.10g per 30 ml at 25 Celsius. The sample is dissolved in 30 ml of hot water and cooled to 25 Celcius. How muc..
Explain the efffect of temperature on the solubility of gases in liquid? What effect does pressure have on the solubility of gases in liquid( Henry's Law)?
Balance the following reactions. You may have to supplement the reaction with H+, H2O, or OHdepending on the reaction conditions
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