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A substance has a vapor pressure of 77.86mm Hg at 318.3 K as well as a vapor pressure of 161.3 mmHg at 340. 7 K. Compute its heat of vaporization in kJ/mol.
Consider the reaction 2 NO2(g) N2O4(g) . (a) Using Gf N2O4(g) = 97.79 kJ/mol and Gf NO2(g) = 51.3 kJ/mol, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the partial pressures of NO2 and N2O4 are 0.40 atm and 1.40 atm, respectively. kJ
zinc metal is added to hydrochloric acid to generate hydrogen gas and is collected over a liquid whose vapor pressure
To what volume should you dilute 53.0mL of a 4.00 M KI solution so that 20.5mL of the diluted solution contains 2.70g of KI
Explain what is the pH of a 0.1M KAl (SO4)2 solution. Same. For 0.1M NaC2H3O2, 0.1M NH4Cl, 0.1M ZnCl2, 0.1MNa2HPO4.
Determine the pH of a solution of 10-3 M sodium formate. Formate is a byproduct of microbial metabolism, and can also serve as an energy source for anaerobic bacteria.
What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL , should be used to make 5.30L of an HCL solution with a of pH 1.8
Consider the reaction A -> B the rate of the reaction is 1.6 x 10^-2 m/s when the concentration of A is 0.35 M. Calculate the rate constant if the reaction is first order in A.
What range of magnetic field strength would be required to cover the mass range between 16 and 625, for singly charged ions, if the accelerating voltage is held constant?
in a coffee-cup calorimeter 1.60 g of nh4no3 is mixed with 78.0 g of water at an initial temperature of 25.00degc.
a solution made by dissolving 5.00 g of a protein in 175 ml of solution has an osmotic pressure of 42.0 torr at 10
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.00 mL Ti solution of unknown concentration with 3.00 mL of a 11.7 micrograms/mL solution of Co
Using what you know about acid/base chemistry, determine the immediate effect that two 325-mg aspirin tablets would have on the pH of the stomach. Assume your stomach is half a liter in volume.
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