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1.The enthalpy change for the following reaction is -903 kJ. Using bond energies, estimate the N-H bond energy in NH3(g).
4NH3(g) + 5O2(g)4NO(g) + 6H2O(g)
kJ/mol
2.The enthalpy change for the following reaction is -108 kJ. Using bond energies, estimate the C=O bond energy in COCl2(g).CO(g) + Cl2(g)COCl2(g) kJ/mol
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if the natural abundance of K 40 is 0.010% and 3500 disintegration of K 40 occur every 10.0sec, in human body weighing 100kg,then what is the concentration of potassium in clued all isotopes in that body? Assume density of human is 1g/ml
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A 10.00mL aliquot of a weak base is titrated with HCL. The equivalence point is reached after 17.21mL of 0.4332 mol/L HCL has been added. The pH is equal to 10.03 after 5.00mL of HCL was added. Determine
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