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Calculate pCu at the equivalence point in the titration of 20.0 mL of 0.0161 M CuSO4 with 0.0100 M EDTA at pH 8.00.
What is the heat change in J associated with 37 g of gaseous methanol at 89 oC changing to liquid at -64 oC?
How many grams of solid sodium phosphate, Na3PO4, are needed to prepare exactly 250ml of a 0.500M Na+ solution?
The vapor pressure of CCl4 (MM = 153.81g/mol) at 65 degree celsius is 504mmHg. How many grams of C10H8 (MM= 128.2gmol) must be added to 25.00g of CC4 so that the vapor pressure of CCl4 is 483mmHg?
Acetic acid has a Ka of 1.8 times 10^{-5}. Three acetic acid/acetate buffer solutions, A, B, and C, were made using varying concentrations: 1. [acetic~acid] ten times greater than \rm [acetate]
If the molar enthalpy of water is 6.009 kJ/mol, how much energy is needed for 4.5 moles of ice to melt at STP?
Phenolphthalein is one of the most common indicators. What are its colors in acidic and in basic solutions?
4 moles of nitrogen gas is placed inside a piston and cylinder device. The piston has a mass of 50 kg and an area of 0.05 m2. 100 kg of weights are placed on the piston. After coming to equilibrium the piston is locked into place.
How is "soap" chemically different from "detergent"? What chemical features and properties of detergents make them better than soap for hard water applications?
Intravenous medications are oftend administered in 5.0% glucose by mass. what is the osmotic pressure of such solutions at 37 C? assume that the density of the soloution is 1.0 g/mL.
Find the concentration of the HCL solution in moles/liter. b). How could the HCl soluted be diluted to make 1000ml of HCl solution with a concentration of 0.400M
The electrolysis of molten Al2O3 at 980 ºC is used to produce metallic aluminum. A current of 360 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour?
A 31.0-g sample of water at 270. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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