How much energy is generated from freezing 2.5 g water? A. 2.5 g < 1 mol/18.02 g < (285.83) kJ/mol
B. 2.5 g < 1 mol/18.02 g * (-285.83) kJ/mol
C. 2.5 g x 1 mol/18.02 g x 4.186 kJ/mol
O D. 2.5 g x 1 mol/18.02 g x 40.65 kJ/mol

When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.