Ch. 1, 2, 26  measurement, atom / molecules, & organic         test     [60 points]       AP Chem

 

For problems involving calculations, show your work in an organized manner, include any relevant equation (or formula and conversion factor(s)), put the proper units in your calculations / answer, and have the proper number of significant figures in your answer.              

 

Academic Honesty:   The answers on this test are my own and I am using only the allowed set of notes as described in the syllabus.  I have not discussed the test questions with anyone before or during the test nor have I seen the test questions prior to the exam.  If you violate any of the preceding items or do not sign, your semester grade is a F.

 

                                                                                                Signature:  ___________________

 

 

1.  fill-in the below table  [15 points]

 

symbol

# protons

# neutrons

# electrons

charge

Atomic mass

 

90Sr2+

 

 

 

 

 

 

 

 

 

 

28

 

 

 

+ 3

 

 60

 

 

 

 

 

 

86

 

- 3

 

210

 

 

 

2.  fill-in the below table; compounds might be hypothetical.  [10 points]

 

Chemical formula

Chemical name

 

K2CO3

 

 

 

 

CuO

 

 

 

 

P3Br7

 

 

 

 

S2Cl5

 

 

 

 

 

Mercury (I) sulfide

 

 


3.  The density of gold is 19.32 g / cm3.  A cylinder of gold is 2.00 feet long and has a diameter of 1.5 inches was melted to form a sphere; what is the radius of the sphere (in cm) ?  [15 points]

[FYI:    formula for volume of sphere & cylinder given]

 

 

4.  Draw 4 isomers with a propyl group attached to a carboxyl group.  [12 points]

 

 

5. solve.  [8 points]

a.  5.0 cm3 / sec  =  __ L / min  [4 points]

 

b.  2.1 + 3.25 =  ___________   [2 points]

 

c.  a third of 2.0  =  ____________   [2 points]