June 2011 Chemistry Regents #66-68

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Questions

Base your answers to questions 66 through 68  on the information below. Ozone, O3(g), is produced from oxygen, O2(g), by electrical discharge during thunderstorms.The unbalanced equation below represents the reaction that forms ozone. 66. Balance the equation in your answer booklet for the production of ozone, using the smallest whole-number coefficients. [1] HIGHLIGHT TO SEE THE ANSWER   3 O2 ==> 2 O3 67. Identify the type of bonding between the atoms in an oxygen molecule. [1] HIGHLIGHT TO SEE THE ANSWER covalent  (it said molecule didn't it) also accepted= double covalent and polar covalent 68. Explain, in terms of electron configuration, why an oxygen molecule is more stable than an oxygen atom. [1] HIGHLIGHT TO SEE THE ANSWER Oxygen atom does not have a full valence shell Both oxygen's in O2 has achieved an octet (Noble gas configuration) while an oxygen atom has 6 valence electrons.   on to Questions 69-70

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