CHEM1303_Exam_1_BZ2015_key.doc - Exam1a Chem1303.004 GeneralChemistry Fall2012 Name(printlegibly Seatno . inanorderlymanner

CHEM1303_Exam_1_BZ2015_key.doc - Exam1a Chem1303.004...

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Exam 1a Chem 1303.004 General Chemistry Fall 2012 Name (print legibly)___________________________________________ Seat no.__________ Sign HONOR CODE on reverse when finished. SHOW ALL WORK  for any calculations.  All  numbers and units  must be clearly shown in your calculations  in an orderly manner. All numerical answers must contain the  correct number of significant figures . Clearly indicate  a numerical answer by circling it.  Any answer that is not clear will be marked wrong. 1.   (4 points)   2. (5 points) The Telluride ion (Te 2- ) with a mass number of 121 has  ___52___ protons  _____69_____  neutrons and ______54___ electrons.        1 pt each Would you expect it to have a large % abundance?  Explain your answer. No the average atomic mass for tellurium is 127.6.  If it has a high large % abundance  the average atomic mass would be closer to 121. 2 pts. 4. (6 points) 3 pts correct formula.  3 pts correct molar mass 6. (6 points) There are two naturally occurring isotopes of Chlorine,  35 Cl,  37 Cl with masses of 34.97  amu and 36.966 amu respectively.  What is the percent abundance of each isotope?  SHOW 
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  • Fall '08
  • Maguire
  • Chemistry, pts, average atomic mass, points correct formula

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