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A 50.70 mL of sample of Ca(OH)2 solution is titrated with 0.1188 M HCl. What is the molarity of the calcium hydroxide solution if the titration requires 38.10 mL of the acid to reach the endpoint?
Describe the biogeochemical cycles for H2O, C and N and describe how human activities have thrown them out of their natural balance.
Draw structure for the product from reaction of 1,3-cyclohexadiene and maleic acid (cis-2-butenedioic acid).
Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 9.39? The Ksp of Fe(OH)2 is 4.87×10-17
a tank with a volume of 1.00M3 is filled with air at 0 degrees to 20 times its atmospheric pressure. How much volume will occupy at 1 atom and room temp?
Explain clearly the properties of agood freezing agent basing the explanation vant hoffs factor and on colligative property.
Calculate delta G for the reaction when the partial pressures are PH2 = 0.25atm, PCO2 = 0.81atm, PH2O = 0.62atm, and PCO = 1.20 atm.
20.0ml of 0.150M Zn(NO3)2 are mixed with 20.0ml of 1.00 x10-4M Na2S. Calculate the amount of milligrams of ZnS (s) that will precipitate. (Ksp = 1.6 x10-24)
Citric acid, found in citrus fruits, is a triprotic acid, H3C6H5O7. Write the Chemical equations for the three-step ionization of this acid in water and write the three Ka expressions (equilibrium laws)
A chemist prepares a sample of hydrogen bromide and finds that it occupies 252 mL at 70C and 464 Torr. What volume would it occupy at 0C at the same pressure.
The dependance of the equilibrium constant of a reaction on temperature is given by the van't Hoff equation: lnK = -change of H/(RT) + C where C is a constant
what would the change in temperature be in each change if 1 mole of an ideal gas is subjected to numerous changes in
aqueous solution given the density of the glucose solution is 1.23 g/cm^3.
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