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Define the enthalpy of FeBr3 (s) is -269 kj/mol and the enthalpy of the reaction 2Fe(s) +3Br2(g) ->2FeBr3 (s) is -631 kj/mol. Compute the enthalpy of evaporation of Br2 (l) which is liquid at 25C.
A close chemical relative of the banned insecticide DDT is methoxychlor (C16H15Cl3O2). Methoxychlor is currently used as a home insecticide. Calculate the mass percent of oxygen in methoxychlor.
Ice floats on water. For most other substances however, the solid sinks in the liquid.Classify each of these statements as true for water, or true for most other substances.
find the solubility of argon in liquid ammonia at 20degc and 200 bars pressure. using raults law and antoines equation
Balance the following oxidation-reduction reactions that occur in basic solution.
1. partition functions for particle in the boxconsider the he atom again with the three wave functions that you do not
compound has decomposed. What is the half-life of this reaction assuming first-order kinetics?
the vapor pressure of nitrogen at several different temperatures is shown below.temperature k pressure torr65 130.570
what is the molarity of a solution that contains 36.0g of vitamin B1 hydrochloride (molar mass = 337g/mol) in 190mL of solution?
A 170.0 g sample of metal at 79.00*C is added to 170.0 g of H2O(l) at 14.00*C in an insulated container. The temperature rises to 16.19*C. Neglecting the heat capacity of the container, what is the specific heat of the metal
That a supercooled gas eventually phase separates is consistent with the 2nd Law of Thermodynamics because the phase separation lowers the Helmholtz free energy of the system
Which element is the central atom? Hydrogen cyanide, Ammonia, Calcium carbonate, Magnesium sulfate
The thermogram for the reaction is depicted below. The calorimeter constant is 28.1 J/ Celcius. Both solutions were initially at 21.31 Celcius. Calculate Delta Hrxn for the reaction.
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