Ch. 1, 2,  & 25  measurement, atom/ion/molecule, organic- / bio- chem                 75 points                                               AP chemistry

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.

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

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

2. Identify the number of each atom and its name (not symbol) in one molecule of the below chemicals. [10 points]

a. Sr3(PO4)2 has  _____________________________________________________________  

b. NiS  has  ___________________________________________________________________ 

3. Fill-in the below table.  [16 points]

Chemical name

Chemical formula

Iron (III) oxide

 

Magnesium nitrate

 

 

Pb(OH)2

 

P3Br6

Dinitrogen pentachloride

 

4. Solve.  [15 points]

a. 25 cm 2  =  ___  inch 2

b. 175 cm 3  =  __  L

 c. 55 mm 2 / sec  =  __  cm 2 / minute

 5. Sketch the structural formulas for 9 isomers of an alcohol with a pentyl group.  [9 point

6.  The amino acid glycine (gly) and alanine (ala) has a hydrogen and methyl group, respectively, as their side chain.  Draw the structural formula of a tripeptide, whose primary structure is ala – gly – gly, where alanine is the amino end of the peptide.  Identify the peptide bond(s).  [10 points]