Homework Assignment #2
Chem 102 – Due 7 January 2015, by 5:00 pm
1) Based on intermolecular forces, rank the following compounds from highest to lowest melting
points: butane, decane, hexane, ethane; explain why.
2) Draw the following:
a) dichlorodiiodomethane
b) 1,4-diethylcyclohexane
c) cis-2-octene
d) 1-bromo-3-chloro-1-heptyne
e) 1,3,5-trifluoropentane
3) Write a balanced chemical equation for the combustion of the following:
a) heptane
b) cyclobutane
c) octane
d) 2,2,4-trimethylpentane (aka isooctane)
4) Write a balanced chemical equation for the bromination of the following (show all possible
products):
a) hexane
b) methane
c) pentane
d) 2-hexene
e) cis-5-octene
5) A patient receives 9.0 ng (9.0 x 10-9 g) of a radioisotope with t1/2 = 12 hrs. How much will remain
in the body after 2.0 days (48 hrs.), assuming radioactive decay is the only path for removal of the
isotope from the body?
6) Write a balanced nuclear equation for alpha decay of bismuth-212.
7) Complete the following nuclear equation:
190 Pt
78
+?
8) Complete the following nuclear equation:
?  21490Th + 
9) Briefly describe the 3 major types of nuclear radiation.
10) What are cis/trans isomers? Which type of organic molecules can have cis/trans isomers?
11) Write the balanced chemical equation for the hydration of 1-propene. Circle the major product.
12) Write the balanced chemical equation for the hydrogenation of 3-heptene.
13) If a patient is administered 10 ng of technetium-99m, how much will remain 1 day later?
Assuming radioactive decay is the only pathway whereby Tc-99m is removed from the body.
14) Draw the following:
a) 1,2,4-triethylbenzene
b) 1,3,4-trinitrotoluene (aka TNT; nitro group = NO2)
c) 1,2-dimethylbenzene
15) What is the main use of alkanes in today’s society?
16) List the IUPAC rules for naming: alkanes, cycloalkanes and alkenes.