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A solution is prepared by adding 50.0 ml of 0.050M HBr to 150.0 ml of 0.10M HI. Calculate the concentration of all species in this solution. HBr and HI are both considered strong acids.
Determine the root-mean-square speed of CO2 molecules that have an average kinetic energy of 4.2 x 10^-21 J per molecule.
When 2.45 g of an unknown weak acid HA with a molar mass of 85.0g /mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.256 C.
Copper has two naturally occurring isotopes,63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope
What mass of lead sulfate is formed in lead-acid storage battery when 1.10 g of Pb undergoes oxidation?
What is the average molecular mass of a diving-gas mixture that contains 1.5\% by volume O2 and 98.5\% by volume He
What is the identity of the metal if 0.280 grams of the metal is plated out in the electrolysis? Show all calculations.
Calculate the lattice enthalpy (?Hl° in kJ/mol) of the MF2 metal fluoride using the following data: Bond dissociation enthalpy of F2(g) = 159 kJ/mol Electron affinity of F = -328 kJ/mol Enthalpy of sublimation of M = 123 kJ/mol First ionization en..
The heat of vaporization, ?Hvap, of a certain liquid at 25oC is 77.8. kJ/mol. If one mole of the liquid has an entropy of 247 J/K, what is the entropy of one mole of the vapor in equilibrium with the liquid at this temperature
If a wavelength is chosen at which the Cr(H2O)3+ absorbs and the CrEDTA- does not absorb, would you need to boil the solutions
How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (s). The Ksp of Mg(OH)2 is 1.8x10^-11.
Of the several landfill alternatives, which are preventative? Which take up the least space? Explain
a zero-order reaction has a constant rate of 2.90times10-4 mrm s. if after 65.0 seconds the concentration has dropped
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