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Compute the mass of one atom of helium (atomic mass = 1.01 amu). Compute the wavelength of this atom if it is traveling at 0.8 c
Calculate the molarity of S2O32- if 3.0 mL 0.10 M K2S2O8, 2.0 mL 0.10 M K2SO4, 1.0 mL 2% starch, 2.0 mL 0.010 M Na2S2O3, and 5.0 mL 0.20 M KI are mixed.
Calculate the number of moles of oxygen gas produced from the completely catalyzed decomposition of 6.20ml sample of a 3.5% solution of H2O2. The density of the 3.5% solution of H2O2 is 1.01 g/ml.
At 80 degrees Celsius, pure liquid A has a vapor pressure of 700 mm Hg and pure liquid B has vapor pressure of 940mm Hg. What is XA for a solution of A and B with a normal boiling point of 80 degrees Celsius
What are the advantages and disadvantages of gas chromatography compared to other chromatographic techniques
Calculate the enthalpy change of the reaction for per mole potassium carbonate. Assume the specific heat of all solutions are 4.18 J/g°C and all solutions have a density=1.0 g/ml (A:-13.3 KJ) show all calculations please
the beaker and its contents have a total mass of 289.85 g. What volume does the beaker hold? Use ? =1.00 g/mL as the density of water. b) How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mer..
describe any important differences between benzopinacol and benzopinacolone in the ir and hnmr
A sample of gas in a balloon has an initial temperature of 3degrees celsius and a volume of 1740 L. If the temperature changes to 88 degrees celsius , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas
Analysis of an unknown substance showed that it has a moderate melting point and is a good conductor of heat and electricity in the solid phase. Which of the following substance would have those characteristics
Under these conditions, the half-life of the reaction has been estimated to be 6.4 103 min. What would the half-life be if the initial concentration of NO were 13 ppm?
We wish to lower the freezing point of the water in an automobile radiator to -40 °C. The total mass of water present is 12.0 kg. For which one of the following compounds would we have to use the greatest mass of solute to achieve this
Calculate the wavelength of light that would be required to excite an electron from the HOMO to the LUMO. Hint: Recall that (triangle)E=hv=hc/lambda, and that 1 eV=1.602 x 10^-19 Joules.
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