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Calculate the molar concentration of each ion (Na+ and PO4 3-) in a aqueous Na3PO4 solution when 2.0 g of Na3PO4 is dissolved in water so that the final volume of the solution is 150 ml.
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons.
Explain what is the pH of a solution prepared by dissolving 4.1g of HCL in water to make 455mL of HCL solution
A researcher conducts an experiment to determine the work function of a palladium surface. She fires a laser with a wavelength of 254 nm at a certain time and observes electrons hitting a detector
If a solution has a pH of 2.36 and you do a 20-fold dilution of it with ultrapure reagent-grade water, what will its pH be after you dilute it
Which of the following combinations would be the best to buffer an aqueous solution at a pH of 5.0? H3PO4 and H2PO4- (Ka=7.5e-3) HNO2 and NO2 (Ka=(4.5e-4) CH3CO2H and CH3COO (Ka= 1.8e-5) H2PO4 and HPO4 (Ka=6.2e-8)
What mass of P4 is required to react with excess oxygen and produce 16.42 g of H3PO4, if the percent yield is 75.45%? P4 + 5 O2 + 6 H2O ® 4 H3PO4
It takes 45.0 to raise the temperature of an 10.4 piece of unknown metal from 13.0 to 24.0. What is the specific heat for the metal
After I added CO2 to a Grignard reagent in lab, I added some strong aqueous HCl. What was the purpose of this? Give a balanced chemical equation to explain.
Calculate the equilibrium concentrations for all species: B. Calculate the value of the equilibrium constant, K.
What combustion products are produced when materials made from polyacrylonitrile smolder and burn?
Problem- If you were to use a 32.5% ethylenediamine solution and the density of the solution is 0.985 g/ml, what is the mass of the ethylenediamine in 3.4 ml of this solution
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 the total volume of solid and liquid together is 54.00 mL. The solid and toluene together weigh 58.88 g. The density of tol..
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