CHEM 1372 Final Review - ViewAttempt1of1 Title Started...

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View Attempt 1 of 1  Title: FE Started: December 12, 2008 1:03 PM Submitted: December 12, 2008 2:58 PM Time spent: 01:55:09  Total score: 26/30 = 86.67%   Total score adjusted by 0.0  Maximum possible score: 30 
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1.      The hypothetical metal Q has two isotopes,  50 Q (isotopic mass 49.9715 amu, abundance 83.55%),  52 (isotopic mass 51.9663 amu). Calculate the atomic mass of Q to two decimal places and do not put units.     Student Response Correct Answer Answer 50.29   50.30    Score: 1/1    2.      What is the sum of the numbers of neutrons and electrons in the ion  209 Po 1+ ?      Score: 1/1    3.      The Bohr equation for the hydrogen atom is  E n  = -2.179 x 10 -18 J /n 2 . What is the ionization energy, in  J , for  the loss of an electron from the lowest excited state?  
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   Score: 1/1    4.      What feature of an orbital is related to the angular momentum quantum number ( l )?      Score: 1/1    5.      Iron(III) oxide is used as a pigment. Which of the following is its formula?  
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   Score: 1/1    6.      How many chlorine atoms are present in 40.0 g of chloroform, CHCl 3 ? Enter your answer in scientific notation (1.23 x 10 4  = 1.23E4) using three significant figures.  Do not enter  units with your answer.      Score: 1/1    7.      The formula of holmium oxide is Ho 2 O 3 . Based on this information, the formula of the phosphate  of  holmium is expected to be  
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   Score: 0/1    8.      How many total dots are present in the Lewis dot diagram of SeCl 4 2- ?
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