Name:  ______________________________                                                date:  _______

Ch. 1, 2, 3.3 measurement & atom / molecule             test     [70 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; compounds might be hypothetical.  [10 points]

Chemical formula

Chemical name

(NH4)2S

 

Sn(C2H3O2)4

 

P3I6

 

 

Aluminum oxide

 

Mercury (I) phosphate

2.  solve  [10 points]

a.  22.0  ÷ 7.0  =  _____________

b.  123.45  -  6.735  =  ____________

c.  200,261 has  ___  significant figures

d.  0.0002010 has  ___ significant figures

e.   0.0002090 using scientific notation is _________________

3.  solve  [10 points]

a.  5.0 nm / msec = ___ cm / minute

b.  if  (2.4 nmole / s)  = k (9 mmoles / L)^0.5, then k =  ____ (in terms of moles, L, & seconds)

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


symbol

# protons

# neutrons

# electrons

charge

mass number

90Sr 2+

 

 

 

 

 

 

28

 

 

+ 3

60

 

 

 

86

- 3

210

5.  Based on the below mass spectrum of an atom, estimate its average atomic mass.  Clearly label the peaks in the below spectrum with your estimate of the value of the horizontal and vertical axis; your calculations have to be consistent with these values.  [15 points]

mass spectrum

6.  Odyssey related question:  list and describe the type(s) of motion in a molecule.  [10 points]