June 2017  Chemistry Regents #6-10

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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 54-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-76  Questions 77-80  Questions 81-82  Questions 83-85 

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6. On the Periodic Table, the number of protons in an atom of an element is indicated by its

(l) atomic mass

(2) atomic number

(3) selected oxidation states

(4) number of valence electrons

2linkprotons are equal to the atomic number of the element

7 Which type of formula shows an element symbol for each atom and a line for each bond between atoms?

(1) ionic          (3) empirical

(2) structural    (4) molecular

2linkstructural formula is the one with the bonds, you know the structure of the compound

8. What is conserved during all chemical reactions?

(1) charge   (3) vapor pressure

(2) density (4) melting point

1 charge, mass and energy are always conserved

 

9. In which type of reaction can two compounds exchange ions to form two different compounds?

(1) synthesis

(2) decomposition

(3) single replacement

(4) double replacement

 
4linkAB  + CD==> AD  + CB

 

Double replacement

10 At STP, two 5.0-gram solid samples of different ionic compounds have the same density. These solid samples could be differentiated by their

(1) mass      (3) temperature

(2) volume (4) solubility in water

4linkJust ask your self can 2 different objects have the same....

mass...yes

temp...yes

volume...yes

solubility...nope  Table G

 

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 54-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-76  Questions 77-80  Questions 81-82  Questions 83-85 

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