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If a system has 2.00 x 10^2 kcal of work done to it, and releases 5.00 x 10^2 kJ of heat into its surroundings, what is the change in internal energy of the system
A reaction mixture initially contains a Br2 partial pressure of 755 torr and a Cl2 partial pressure of 725 torr at 150 K. Calculate the equilibrium partial pressure of BrCl.
Calculate acidity of sample and express in % (w/v) CH3COOH. show complete solutions and please don't cite websites or like
What is the equilibrium concentration of HXY4 ^2- for a 0.15 M solution of the triprotic acid, H3XY4?
Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. Kf = 1.86°C/m
Conversely, what is the percent H2SO4 in a 6.0M solution of H2SO4? Density of solution = 1.84g/cm^3
Identify the nuclide produced when americium-241 decays by alpha emission, 241 / 95 Am→ 4 / 2 He + ? Express your answer as an isotope using prescripts.
The next question was this: "What is the PH at it's equivalence point? AS part of your answer, define equivalence point. What does it mean for a substance to be at its equivalence point?"
Classify each of the following as a compound, a homogeneous mixture, or a heterogeneous mixture. (a) wax (c) air (d) gasoline (e) iron(II) sulfide
Separate samples of an aqueous solution of an unknown ionic salt are treated with dilute aqueous solutions of hydrochloric acid, sulfuric acid, and potassium hydroxide. Precipitates are formed in all three cases.
What was the concentration, in mol/L and mg/L, of Cu^2+ and Zn^2+ in the original solution? If the solution was prepared by dissolution of 0.654 g of brass in 250.00 mL solution, what the percentage of copper and zinc in the original sample of bra..
A gaseous mixture of O2 and Kr has a density of 1.111 g/L at 420. torr and 300. K. What is the mole percent O2 in the mixture?
During the chlorination of drinking water and wastewater, what is it that makes chlorine an effective microbiocide?
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