CHM1025 Exam 3 Review, Spring 2017
Name: _____________________________________ Date: _________________
1. What could be said about the following reaction?
N2(g) + O2(g) + 43kcal  2NO(g)
a. The rxn is endothermic and delta H will be negative.
b. The rxn is endothermic and delta H will be positive.
c. The rxn is exothermic and delta H will be negative.
d. The rxn is exothermic and delta H will be positive.
e. The rxn is endothermic and delta H will be zero.
2. Which of the following orbitals has the lowest energy?
a. 3d
b. 4s
c. 4d
d. 4p
e. 5s
3. How much energy would be required for 5g of oxygen gas to become ozone.
3O2(g)2O3
delta H = +285.4 kJ
a. 10 kJ
b. 18.4 kJ
c. 7.9 kJ
d. 6.5 kJ
e. 14.9 kJ
4. Write out the total and net ionic equations for the reaction between lithium hydroxide
and hydrobromic acid. (Free Response)
5. In a reaction of 15g of Sodium Nitrate with excess Barium Chloride what is the largest
possible amount of Barium Nitrate that could be obtained?
a. 2 g
b. 10 g
c. 16 g
d. 18 g
e. 23 g
6. Which element has the highest ionization energy?
a. P
b. K
c. Te
d. Cl
e. Sb
7. Which element has the biggest size?
a. C
b. Rb
c. F
d. Na
e. Fe
8. What is the formal charge of the nitrogen in ammonium?
a. -2
b. -1
c. 0
d. +1
e. +2
9. Which element does the following electron configuration refer to?
[Ne] 3s23p2
a. Ne
b. S
c. P
d. Si
e. Al
10. Which electron configuration corresponds to the following ion?
Ga2+
a. [Ar] 4s23p3
b. [Ar] 4s23p2
c. [Ar] 4s1
d. [Ar] 4s13p3
e. [Ar] 4s2
11. Draw the best Lewis structure for the chlorate anion. (Free response)
12. By how many electrons does an atom get reduced in the following reaction?
Cu (s) + 2AgNO3 (aq)  2Ag (s) + Cu(NO3)2 (aq)
f. 0
g. 1
h. 2
i. 3
j. 4
13. Ethane is considered what in the combustion of Ethane?
a. Oxidized
b. Reduced
c. Oxidizing agent
d. Reducing agent
e. None of the above
14. When Hydrochloric acid is reacted with elemental iron, what should your products be?
a. Fe + FeCl2
b. FeCl2 + H2
c. HCl + H2
d. H2O + Cle. FeCl2 + H2O
15. When 10g LiNO3 reacts with 10g BaSO4 in solution what is the limiting reactant?
a. LiNO3
b. BaSO4
c. Li2SO4
d. Ba(NO3)2
e. H2O
16. If 5g of nitrogen gas and 5g of hydrogen gas react to form ammonia what mass of the
reagent in excess remains?
f. 1.08 g
g. 3.17 g
h. 2.56 g
i. 3.94 g
j. 6.11 g
17. You run a combustion of hexane in excess oxygen. Given that you have 6 grams of
organic material, what is the percent yield given that 5.9 grams of water are produced?
a. 69%
b. 30%
c. 14%
d. 91%
e. 42%
18. If the combustion of methane releases 890 kJ/mol, how much heat is released when 36 g
of water are produced?
a. 610 kJ
b. 750 kJ
c. 890 kJ
d. 1000 kJ
e. 1108 kJ