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Neutron diffraction is an important technique for determining the structures of molecules. Calculate the velocity of a neutron needed to achieve a wavelength of 0.955 A° (Refer to the inside cover for the mass of the neutron).
Explain when 1.33 g of vitamin K is dissolved in 25.0 g of camphor the freezing point of the solution is lowered by 4.47C. Compute the molar mass of vitamin K.
given the following datamass of unknown metal carbonate 1.8500gmolarity of hcl solution 0.1789 mmolarity of naoh
a 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. the solution freezes at -1.23degc.
consider two jars. one jar contains 100 blue spheres and the other jar contains 25 each of red blue green and yellow
Determine what is the coordination of the cations in the case of a normal spinel and what point defects are possible in the spinel structure?
given the balanced equation representing a reacction: 2C2H6+7O2=4CO2+6H2O determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6
2I2 + N2H4 → 4HI + N2 a. How many grams of I2 are needed to react with 36.7 g of N2H4?
Calculate the equilibrium partial pressures of the products and reactants if PH2O= .442 atm and PCO = 5.000 atm at the start of the reaction. Assume the carbon is in excess.
a skyscraper in pittsburgh built in the early 1970s is supported by water filled columns. potassium carbonate was added
A solution with pH of 2.91 is prepared by dissolving 1g. of benzoic acid, HC7H5O2, a weak acid, in 350 ml of water. What is Ka of benzonic acid
The final temperature of a mixture of solution prepared by dissolving 2.50 gram of NaOH in 75.0 mL of water (both initially at 25 degrees C) increases to 25.5 degrees C. Is this process exothermic or endothermic. What is the enthalpy of solution o..
Explain what is the concentration of Pb2+ must be exceeded to precipitate PbCl2 from a solution that is .01M in the chloride ion Cl- Ksp for lead Chloride is 1.17x10-5
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