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Sodium thiosulfate, Na2S2O3, can be used as a fixer in the field of photography. Calculate the percentage composition, by mass, of each element in sodium thiosulphate.
A sample of argon gas occupies 125 L at 22C and .975 atm. What volume will it occupy at 60C and .825 atm?
Calculate the heat of formation of propane given the heat of formation of H2O (liquid) is -285.3 kJ/mol and the heat of formation of CO2 is -393.5 kJ/mol.
What is the complete wavefunction for n=2, L=0, and m(sub L)= 0? What radius of the orbital specified is required to contain 95% probability of finding an electron?
illustrate the reaction that would form a carboxylate ion from 2-Methylbutanoic acid. Write the IUPAC name for the ion that forms. Can you please show the condensed format versus the line angle?
lightbulb is visible light and that the average wavelength og the light is 550 nm, how many photons are emitted by the lightbuld each second?
Acetylene gas (C2H2) is produced by adding water to Calcium carbide CaC2. How many grams of acetylene are produced by adding water to 5g CaC2?
Could you tell me what is the purpose of this reaction (Michael and aldol condensation reactions), and the stepwise mechanism of the reaction.
Calculate Ka and Original Concentration of Weak Base, You have a solution of a weak base, the pH of which is 10.7532. If 10.000 mL of this solution will neutralize 6.655 mL of 0.07667
A solution of H2SO4 and KI is then added to conver the MnO2 to MN^2+, and the iodide is converted to I2. The I2 is then titrated with standardized Na2S2O3. Calculate the amount of O2 in 25.0mL of water if the titration requires 2.45ml of 0.0112 M N..
Calculate the molality of the unknown compound (m). m=mol of solute X particles per formation / mass of solvent , kg Data given: Mass of test tube , flask, t-butyl alcohol and unknown
A chemist dissolves 284 mg of pure potassium hydroxide in enough water to make up 140 mL of solution. Calculate the pH of the solution.
Calcium carbide reacts with water to form acetylene and calcium hydroxide. From the following enthalpy data calculate Delta Hf for CaC2
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