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Nitric oxides, NO and NO_2, contribute to air pollution, acid rain, and the depletion of the ozone layer. After NO forms in the combustion chamber of an automobile engine, it reacts further with oxygen to form NO_2. The reaction is given by 2NO (g)} + O2(g)rightarrow 2NO2(g) The following table gives some entropy values: Substance Delta S^ (J/mol\ K) NO_2 240.0 O_2 205.2 NO 210.8 Part A Calculate Delta S rxn^\circ for the reaction 2NO (g) + O_2(g)} \rightarrow 2NO_2(g)
Calculate the minimum energy that a bird of mass 25 g must expend in order to reach a height of 50 m.
The entropy change of the universe for any spontaneous process is always positive The equilibrium constant is always greater than one for an extensive reaction
What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.10 M buffer solution at pH 5.0. Enter your answer to two significant figures.
Find the concentration of the HCL solution in moles/liter. b). How could the HCl soluted be diluted to make 1000ml of HCl solution with a concentration of 0.400M
An experiment was performed to determine the solubility and the solubility product constant of gallic acid, a monoprotic organic acid (gmm=170.12). The equilibrium involved is: C6H5O3COOH(s) C6H5O3COO-(aq) + H+(aq)
A 2.00-g sample of white solid was vaporized in a 345-mL vessel. If the vapor has a pressure of 985 mmHg at 158°C, what is the molecular mass of the solid?
What is the balanced chemical reactions that takes place when h2o2, concentrated h2so4, and Cu(s) is placed in solution. One of the byproducts should be copper sulfate (CuSO4) and there is some gas evolution during the reaction.
How much heat must be absorbed by the six pack to lower its temperature from 25.0C to 5.0C?
Given that Iron(III) oxide or ferric oxide (molar mass = 159.7 g/mol) reacts with Carbon monoxide (molar mass = 28.0 g/mol).
Calculate the mass of each product formed when 244 g of silver sulfide reacts with excess hydrochloric acid. Ag2S(s) + HCl(aq) -------> AgCl(s) + H2S(g)
Is each of the following salts acidic, basic or neutral in aqueous solution. Use appropriate equations to explain why for each please. a) NH4Cl b) NaClO4 c) NaNO2
If the observed specific rotation of the mixture is -50.0°, what is the specific rotation of the pure R isomer?
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