June 2019  Chemistry Regents #6-10

Highlight to reveal answers and explanations

 

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

Questions 51 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

Other Regents Exams

 

 

Questions

AnswerLinks

Explanations

6. Which information is sufficient to differentiate a sample of sodium from a sample of silver?

(1) the mass of each sample

(2) the volume of each sample

(3) the reactivity of each sample with water

(4) the phase of each sample at room temperature

 

3  anything can have the same mass...OUT

or Volume...OUT

reactivity....hmmmm

phase...solid liwuid gas...OUT

7. Graphite and diamond are two forms of solid carbon at STP.  These forms have

(1) different molecular structures and different properties

(2) different molecular structures and the same properties

(3)  the same molecular structures and different properties

(4)  the same molecular structures and  the same properties

 

1  on every Regents

different molecular structures and different properties

8. As the first five elements in group 14 are considered in order from top to bottom, there are changes in both the

(1)  number of valence shell electrons and number of first shell electrons

(2) electronegativity values and number of first shell electrons

(3) number of valence shell electrons and atomic radii

(4) electronegativity values and atomic radii

 

4  1. same number of last shell electrons and 1st is 2, so 1 is OUT

2. look them up on table S...OUT

3.  Still out like #1

4. 4 works...table S for both

 

9. Which statement explains why NaBr is classified as a compound?

(1)  Na and Br are chemically combined in a fixed proportion

(2) Na and Br are both nonmetals.

(3) NaBr is a solid at 298K and standard pressure.

(4) NaBr dissolves in H2O at 298K.

 

1  Na and Br are chemically combined in a fixed proportion

 

That is the Regents Definition

10. Which two terms represent types of chemical formulas?

(1)  fission and fusion

(2)  oxidation and reduction

(3) empirical and structural

(4)  endothermic and exothermic

 

3  1....nuclear reactions..OUT

2. redox is chemical reactions involving electron transfers...OUT

3.  the answer

4.  energy direction of chemical reactions..OUt

 

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

Questions 51 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

Back to Regents Exams