Ch. 7 & 14  IMF & chemical equation            test     [60 points]                   honors 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.  Clearly identify the problems done and do them in sequence and your answer must begin and end on the same page of paper; otherwise, you may lose 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.  Identify the IMF in  ___ ; justify your response.  [10 points]

a.  SeCl₄

b.  BF₃

2.  Describe London IMF in a nonpolar molecule; hint:  include the terms, “dipole moment”, “temporary dipole”, & “induced dipole” in your response.  [15 points]

3.  Which molecule, ___,  has the higher vapor pressure ?  justify your response.  [20 points]

a.  Br₂  versus  I₂

b.     versus  

4.  balance the following chemical equation using the lowest ratio of integers.  If the coefficient(s) is / are “1”, then enter “1”.  [15 points]

a.  ___ CH₃CH₂OH  +  ___  O₂  à  __  CO₂  +  ___  H₂O

b.  ___  calcium nitrate  +  ___  sodium phosphate  à  ___  calcium phosphate  +  ____  sodium nitrate

c.  ___ Na₂CO₃  +  ___  HCl  à  ___ CO₂  +  ___   H₂O  +   ___ NaCl