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An Ice cube tray contains 185 grams of water at 25 degree c.It is cooled until the water freezes ar 0 degree c and then the ice is cooled to -8.5 degree c. How many joules of energy were released by the water during this sequence of changes.? The specific heat of ice is 2.06 j/gK and the molar heat of fusion of water is 6.01 kj/mol.
How much potassium oxalate can be added to 158.0 mL of 0.35 M [Cu(NH3)4]Cl2 before a precipitate of CuC2O4 begins to form?
The wavelength is 6100 Angstrom and the stopping potential is 0.5(eV). calculate the Photon Energy(eV) and Work function(eV).
World energy supplies are often measured in the unit of quadrillion British thermal units (1012 Btu), generally called a "quad." In 2015, world energy consumption is projected to be 5.81 ×1017kJ.
Indicate the approximate location (cm-1) in the IR Spectrum where you would expect to see one or two absorptions that distinguish the compounds in Diethyl Ether.
what mass of Mg is formed from molten MgCl2 if a current of 1.8 amps is passed through the sample for 16.7 hours
At 298k for the cel Pt(s)H2(1 bar)|HCl(0.124m)|AgCl(s)|Ag(s) the electrochemical potential was measured at 0.342V. Calculate the mean activity coefficient for HCl.
the hypothetical metal Q with atomic mass of 68.33 has two isotopes ^67Q (isotopic mass 66.945 amu) and ^69Q (isotpes mass 68.958 amu) calculate the abundance of ^67Q in %
What is the maximum work that can be obtained from a 340 L tank of compressed air at 4350 PSI
Sulfur forms a wide variety of compounds in which it has +6, +4, +2, 0 and -2 oxidation states. Give examples of sulfur compounds having each of these oxidation states
Compute the molar repulsion energy between two nitrogen's nuclei if they are separated by 1.1 Angstroms assume that no electrons are present.
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
THE IONIZATION ENERGY OF HYDROGEN. In a normal hydrogen atom, the electron is in the lowest energy state. The maximum energy that a hydrogen atom can have is 0 cm-1
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