June 2011 Chemistry Regents #60-61

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Questions

Base your answers to questions 60 through 61  on the information below. The balanced equation below represents the decomposition of potassium chlorate. 2KClO3(s) → 2KCl(s) + 3O2(g) 60. Determine the oxidation number of chlorine in the reactant in the equation. [1] HIGHLIGHT TO SEE THE ANSWER +5 KClO3 K=+1 O=-2x3 so Cl=+5 61. State why the entropy of the reactant is less than the entropy of the products. [1] HIGHLIGHT TO SEE THE ANSWER a solid forms a gas the solid reactant is less random than the gaseous product   on to Questions 62-63

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