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Calculate the pH and the concentrations of all species present H3O+, F-, HF, Cl-, OH- in a solution that contains 0.10 M HF Ka = 3.5*10^-4 and 0.10 M HCl.
Calculate the work done in joules, when 4.5 L of argon expands to 11 L at constant temperature against an external pressure 545 torr.
A mixture of water and graphite is heated to 600 K. When the system comes to equilibrium it contains 0.13 mol of H2, 0.13 mol CO, 0.43 mol of H2O and some graphite
Calculate the change in the mass of copper at the anode or cathode if the charge calculated above is passed through the cell described. Enter your answer as a positive quantity in mg. Mass change at the electrode = ? mg
an aqueous solution is prepared by diluting 3.30mL acetone, CH3COH3, (d= 0.789g/mL) with water to a final volumeof 75.0 mL. The density of the solution is 0.993 g/mL. what are the molarity and the molality of acetone in this solution?
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
write the rate law for each elementary reaction in the mechanism. D) if the first step is slow and the second one is fast, what rate law do you expect to be observed for the overall reaction.
From the heats of reaction as given 3O2(g) ---> 2O3(g) DH = +284.6 kJ, 2H2(g) + O2(g) ---> 2H2O(g) DH = -483.6 kJ
solution of the nonvolatile solute ethylene glycol, C2H4(OH)2, in water is prepared. Calculate the vapor pressure of the solution to three significant figures.
Determine how long will it take for a sample of N2O5 to decay to sixty percent of its initial value?
When 28.6 kg of Fe2O3 react with 17.2 kg of CO and 6.3 kg of Fe are recovered, what is the percent yield for the reaction?
At a temperature T, a previously empty 5.00L flask is prepared by adding 1.20 mol SO2 and 1.5 mol of O2. Determine the concentrations of SO2, O2 and SO3 once equilibrium is established. KC=963
Evaluate the electronic configuration for ionization energies of Magnesium, the orbital number in which the electrons are added in phosphorus ion, and the one will lose in the ionization of Alluminium.
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