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Problem- 1) The dimensions of aluminum foil in a box for sale in supermarkets are 66 yards by 12 inches. The mass of the foil is 0.83 kg. If its density is 2.70 g/cm3, then what is the thickness of the foil in inches?
2) When the release of energy from an excited state to the ground state of electron follows that nFINAL is always equal to 3. Determine the frequency (in Hz) and wavelength (in angstrom) of electromagnetic radiation emitted if the excited electron is coming from an initial=6. Is the electromagnetic radiation released a visible light?
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Thermal equilibrium, 10.0g of Fe(s) at 98.0 degrees Celsius is placed in 50.0mL of H2O(l) at 20 degrees Celsius
An environmental chemist sampling industrial exhaust gases from a coal-burning plant collects a CO2-SO2-H2O mixture in a 21-L steel tank until the pressure reaches 850 torr at 45oC.
The following solutions are mixed: 35.0 mL of 0.200 M Ca(OH)2 are mixed with 60.0 mL of 0.125 M HBr. What is the pH of the resulting solution. Assume additive volumes.
What hydroxide concentration is required to, from a 2.50 X 10- 2 M solution of AliS04h, lower the AI3+ concentration in the foregoing solution to 2.00 X 10- 7 M
The voltage meter reads +0.63 volts. Write out the reaction equation, then calculate the standard reduction potential of Fresnium.
Write balanced half-reactions and the overall spontaneous reaction. (Type your answer using the format [NH4]+ for NH4+. Use the lowest possible coefficients.)
If you have a sodium salt of stearic acid and neutralize it with acid, the solubility changes. Explain those relative solubility differences of these two chemical species in a solvent like hexane.
Define how a monochromator in a scanning UV-vis absorption spectrometer works that how is it used to determine wavelength
if you burn 10.00g of octane. if the temperature is 500K, and you have an expansion of 1.00 atm, how much work in joule can be done by the system if the octane is completely converted to CO2 and water vapor. what will be the enthalpy change
An aqueous solution is 13.0% by mass ethanol, CH3CH2OH, and has a density of 0.978 g/mL. The molality of ethanol in the solution is?
Calculate the pH at the equivalence point for the titration of 0.210M methylamine(CH3NH2) with 0.210M HCl. The Kb of methylamine is 5.0*10^-4
A volume of 25.0mL of 100 M C6H5COOH is titrated against a .100 M NaOH solution added to it from a burette. Compute the pH values of the solution after
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