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What is the maximum concentration of Cd2+ that can exist in a solution in which the S2- concentration is 2.5 x 10-6? Ksp(CdS) = 8.0 x 10-27
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself.
A 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. The solution freezes at -1.23°C. Calculate the molecular weight of the solute. Kf for water = 1.86°C/m.
calculate the value for E for the cell at 25oC (b) A current is drawn from the cell until 1.20 g of silver have been deposited at the silver electrode. Calculate the value of E for the cell at that stage of operation.
Explain why the Rf values changed when the eluant was changed from 100% petroleum ether to a 95:5 mixture of petroleum ether-ethyl acetate. Why UV light is not a useful visualization technique in every circumstances?
What volume of a 0.236 M HCHO2 must be added to 1.00 L of a 0.500 M solution of NaCHO2 to give a pH of 3. Assume that volumes are additive.
The inert pair effect is observed for : A) Group IIIA and Group IVA elements B) Group IVA elements C) Group IIIA elements D) group IIA elements E) group IA elements
The reaction of benzanilide with Cl2in acetic acid yields a mixture of 2 monochloro derivatives formed by electrophilic aromatic substitution.
An equilibrium mixture contains {\rm{N}}_2 {\rm{O}}_4, (P = 0.27 atm) and {\rm{NO}}_2 (P = 1.2 atm) at 350 {\rm K}. The volume of the container is doubled at constant temperature.
If this energy were used to vaporize water at 100.0 degrees, how much water (in liters) could be vaporized.
What is the principle quantum number for the inner transition metals? (the atomic numbers are 57 through 102, called the lanthanide series
A student prepares a weak acid solution by dissolving 0.2500 g HZ to give 100. mL solution. The titration requires 30.0 mL of 0.1025 M NaOH
the heat capacity for the heat capacity of the calorimeter in calculating the enthalpy of reaction. What effect would ignoring this have on the calculation?
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