CHEM-001 Midterm 1 Form A Key

Midterm 1 Exam Form A, CHEM 001 Spring 2013.
(Chapters 2 through 6)
Name: ___________________________
1.
How many seconds are there in 3.18x10-8 years?
a) 7.88 x 105 sec
2.
b) 1.00 x 104 L
d) 460 L
c) 77 F
d) 273
Atoms of phosphorous, iron, sulfur, and chlorine have the chemical symbols…
b) P, Fe, S, Cl
c) P, Fe, s, Cl
d) P, Fe+2, S, CL
Element Q has 20 protons, 20 neutrons, and 18 electrons. Determine its identity.
a)
6.
c) 985 L
b) 212F
a) K, Fe, S, Cl2
5.
d) 1.00 sec
25 C is equivalent to…
a) 298.15
4.
c) 4.7 x 107 sec
b) 365 sec
How many liters are there in 9850 kg of a solution whose density is 0.985 g/mL?
a) 10.0 L
3.
Date: __________________
40
Ca2+
40
b)
Cl-
c)
40
Ar+
d)
40
K+
What is the average atomic mass of element X if it has the following three isotopes?
15
X
X
17
X
16
a) 16.19
69.25 %
9.23 %
21.52 %
b) 16.59
c) 17.58
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15.95 amu
16.35 amu
16.89 amu
d) 15.23
Midterm 1 Exam Form A, CHEM 001 Spring 2013.
(Chapters 2 through 6)
7.
How many joules of heat would be required to raise 17.9 g of copper from 25.0 C to
125.0 C? The specific heat capacity of copper is 0.385 J/g C?
a) 689 J
8.
b) 723 J
c) 598 J
d) 17.9 J
If magnesium and phosphorous chemically react to form a compound, what would be
the correct formula of the resulting compound and would it be classified as molecular
or ionic?
a) Mg3P2, molecular
b) Mg3P2, ionic
c) Mg2P3, ionic
d) Mg2P3, molecular
9.
The following systematic names: nitrogen dioxide, magnesium nitrate, sodium oxide,
copper (II) sulfate and perchloric acid are represented by which series of chemical
formulas?
a. NO, MgNO3, NaO2, Cu2SO4 and HClO3
b. NO2, Mg(NO3)2, Na2O, CuSO4 and HClO4
c. NO2, Mg(NO3)2, NaO, Cu2SO4 and HClO2
d. N2O5, Mg(NO3)2, Na2O, CuSO4 and HCl
10.
The chemical formulas Cu2O, Na2SO4, N2O5 and Fe2(SO4)3 have the following
systematic names:
a. nitric acid , sodium sulfate, dinitrogen pentoxide and iron (III) sulfate
b. trinitrogen pentoxide, copper (I) oxide, sodium sulfate and iron (II) sulfate
c. copper (I) oxide, sodium sulfate, dinitrogen pentoxide and iron (III) sulfate
d. copper (II) oxide, sodium sulfate, dinitrogen pentoxide and iron (III) sulfate
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