CE 351 Introduction to Environmental Engineering
Homework Assignment III (110 pt) Due September 11 Midnight
Fall 2022
Y. T. Wang
(15)1. Draw a structure for each of the isomers possible for C6H14. Give the systematic name of
each isomer you have drawn.
(15)2. If one hydrogen atom is replaced by a chlorine atom in n-hexane, draw a structure for
each of the isomers possible and give the name for each.
(10)3. Draw the structure for each of the following organics:
a.
b.
c.
d.
e.
Dichloromethane
1,1,2,2-Tetrachlorethane
1,1-Dichloroethylene
Trichloroethene (TCE)
Dichlorofluoromethane
(10)4. Write the name for the following compounds:
a.
b.
c.
a.
b.
CH3COOH
CH3CH2OH
CH3COCH2CH3
CH3CHOHCH3
CH3CH2COOH
(10)5. Write both the structure and name for each of the eight alkanes with unbranched carbon
chains starting with one carbon and ending with eight carbons.
(10)6. Draw the structures for the following aromatic compounds:
a.
b.
c.
d.
e.
Toluene
Phenol
1,2-Dichlorobenzene
m-Xylene
Ethylbenzene
(20)7. (a) What values of a and b would complete each of the following:
210
84
27
12
Po→ba X + α
Mg →ba X + β
Give the names of the decay products.
(b) What particles are emitted in the following reactions?
226
88
82
35
Ra→ 222
86 Rn + ?
Br →3682Kr + ?
(10)8. The decomposition of N2O5 in nitric acid is a first-order reaction. If it takes 7.2 min at
90°C to decrease 60.0 mg of N2O5 to 0.5 mg. What would be the reaction rate constant k
in minutes-1 and seconds-1?
(10)9. The half-life of iodine-125 is about 62 days. If we were to start with 1.0 kg of it, about
how much would remain after 15 years?