Name:  ______________________________                                                date:  _______

Ch. 1, 2, & 25   measurement, atoms, molecules, & organic chemistry  test       AP Chem

For problems involving calculations, show the relevant equation (or formula and conversion factor(s)), show your work in an organized manner, put the proper units in your calculations / answer, and have the proper number of significant figures in your answer.  [90 points]

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 blank; need not show work.  [6 points]

a.  5.12  +  7.376  =  _________

 

b.  38.6 ÷ 1.7  =  _____________

 

1  _______________

2.  fill-in the blank; show your work.  [15 points]

a.  17.4  mm  =  __  cm

 

b.  2

 

c.  57.85 km2   =  __  m2


3.  What is the radius of a 3.1 g copper sphere ?  The density of copper is 3 and the volume of the sphere is 4.   [9 points]

 

4.  fill-in the table.  [10 points]

symbol

# protons

# neutrons

# electrons

charge

Atomic mass

65 Cu2+

 

 

 

 

 

 

47

 

 

+ 1

110

 
5.  A hypothetical sample of carbon contains 75.0 % 12 C, 10.0 % 13 C, and an unknown amount of 14 C.  Based on this information, determine the average atomic mass of carbon.  [10 points]


6.  fill-in the table.  [10 points]

Chemical name

Chemical formula

 

Fe(OH)3

Barium nitrate

 

 

P3 Cl8

Ammonium sulfate

 

 

S4 Br6

 

7.  sketch the structural formula of 5 isomers of hexane.  [10 points]

 

8.  sketch the structural formula of:   trans-3-, 4- dimethyl-3-hexene.  [5 points]

 

9.  sketch the structural formula of an example of  ____.  [15 points]


a.  aldehyde                                b.  ester                                  c.  carboxylic acid