June 2014 Chemistry Regents #11-15

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-54 Questions 55-56 Questions 57-58 Questions 59-61 Questions 62-65 Questions 66-69 Questions 70-72 Questions 73-75  Questions 76-79  Questions 80-82  Questions 83-85

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Questions

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Explanations

11 The greatest amount of energy released per gram of reactants occurs during a

(1) redox reaction

(2) fission reaction

(3) substitution reaction

(4) neutralization reaction

2 link nuclear reactions produce more energy than conventional reactions

E=mc^2

12  Which element has atoms with the strongest attraction for electrons in a chemical bond?

(1) chlorine     (3) fluorine

(2) nitrogen     (4) oxygen

3 link definition of electronegativity

look up values on table S

13 Compared to the physical and chemical properties of the compound NO2 the compound N2O has

(1) different physical properties and different chemical properties

(2) different physical properties and the same chemical properties

(3) the same physical properties and different chemical properties

(4) the same physical properties and the same chemical properties

1   NO2 and N2O are different compounds and there for have different properties. Both chemical and physical.

 

14 Which phrase describes a molecule of CH4, in terms of molecular polarity and distribution of charge?

(1) polar with an asymmetrical distribution of charge

(2) polar with a symmetrical distribution of charge

(3) nonpolar with an asymmetrical distribl1tion of charge

(4) nonpolar with a symmetrical distribution of charge

4 link CH4 is nonpolar and is symmetrical

SNAP

15 Which sample of copper has atoms with the lowest average kinetic energy?

(1) 10.g at 45oC     (3) 30.g at 25oC

(2) 20.g at 35oC    (4) 40. g at 15oC

4 link lowest average KE

is the lowest temperature

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-54 Questions 55-56 Questions 57-58 Questions 59-61 Questions 62-65 Questions 66-69 Questions 70-72 Questions 73-75  Questions 76-79  Questions 80-82  Questions 83-85

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