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A student titrates 25.0 mL of a 0.100 M solution of acetic acid with a 0.100 solution of sodium hydroxide. Calculate the pH at the equivalence point.
2ZnS + 3O2 = 2ZnO + 2SO2 how many moles of Zno are produces when 32 gms of oxygen is allowed to react with an excess of ZnS?
Calculate the expansion work done against a constant external pressure of 0.969 atm and at a constant temperature of 24°C. Assume that the initial volume of dry ice is negligible and that CO2 behaves like an ideal gas.
An unknown metal m reacts with sulfur to form a compound with the formula M2S3. If 3.12g of m reacts with 2.88g of S, what are the names of M AND M2S3
a 32.85-g sample of a solid is placed in a flask. toluene in which the solid is insoluble is added to the flask so that
What would be the expected effect on yield if only one mole of diethylamine per mole of alpha-chloro
What is the difference between molecular formulas and structural formulas of organic compounds? In the crystal structure of NaCI, what are the number and type of ions that are nearest neighbors to each Na+ ion?
Calculate the work for a process which one mole of NH3 gas is expanded from 1.0L to 20.0L in an isothermal reversible process at 300K.
A quantity of 1.25 mole of an ideal gas at 328 K expands isothermally against a constant external pressure of 2.85 atm from 3.12 L to 11.85 L. Calculate the values of q, w, delta H, delta S system
Assume that a solid has a constant of Cp,m=25 J/K-mol from 50K to 298K and that the DeBye approximation is valid from 0K to 50K. Estimate the standard molar entropy Sm for the solid at 298K.
When 0.78 g of an unknown gas in contained solely in a 560 mL container, the pressure is 780 Torr at 5 degrees Celcius. What is the molar mass of the gas in grams/mole?
The Ni2 extracted from the column was treated witn 25.00 mL of 0.05804 M EDTA. How many milliliters of 0.02282 M Zn2 is required for the back titration of the Ni2 solution?
the distance between the atoms of H-I is 1.61 A. What is the distance in meters. What is the charge associated with each side of the HI molecule
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