January 2016 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 51-53 Questions 54-56
 Questions 57-61 Questions 62-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-82 Questions 83-85

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Questions

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Explanations

11 Which compound contains both ionic and covalent bonds?

(1) KI         (3) CH2Br2

(2) CaCl2    (4) NaCN

4   ionic look for a metal and nonmetal

covalent look for nonmetal and a nonmetal

both look for a metal and 2 nonmetals

12  Given the balanced equation representing a reaction:

H2 --> H  +  H

What occurs during this reaction?

(1) Energy is absorbed as bonds are formed.

(2) Energy is absorbed as bonds are broken.

(3) Energy is released as bonds are formed.

(4) Energy is released as bonds are broken.

2   breaking bonds absorbs energy
13   Parts per million is used to express the

(1) atomic mass of an element

(2) concentration of a solution

(3) volume of a substance

(4) rate of heat transfer

2   Table D- concentration of a solution

Units and what they are used for

 

14  According to Table F, which ions combine with chloride ions to form an insoluble compound?

(1) Fe2+ ions     (3) Li+ ions

(2) Ca2+ ions     (4) Ag+ ions

4   look at the exceptions under Halides (Cl- is a halide...a halogen with a negative charge)
15 At 1 atm, equal masses of H2O(s), H2O(l), and H2O(g) have

(1) the same density

(2) the same distance between molecules

(3) different volumes

(4) different percent compositions

3   different volumes...test them in your head

 

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 51-53 Questions 54-56
 Questions 57-61 Questions 62-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-82 Questions 83-85

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