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In a coffee-cup calorimeter, 1 mol KOH and 1 mol HBr initially at 23.5 oC (Celsius) are mixed in 100g of water to yield the following reaction: KOH + HBr ? K+(aq) + Br-(aq) + H2O(l) After mixing the temperature rises to 78.2 oC. Calculate the change in enthalpy of this reaction. Specific heat of the solution = 4.184 J/(g oC) State your answer in kJ with 3 significant figures. Don't forget to enter the unit behind the numerical answer. The molecular weight of KOH is 56.2 g/mol, and the molecular weight of HBr is 80.9 g/mol.
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Some species with two oxygen atoms only are the oxygen molecule, O2, the peroxide ion, O2-2 , the superoxide ion, O2-1 , and the dioxygenyl ion, O2+1 . Draw an MO diagram for each, rank them in order of increasing bong length, and find the number ..
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