Chemistry 1211K
Test I
MULTIPLE CHOICE. (3 points each)
1) If matter is uniform throughout, cannot be separated into other substances by physical
processes, but can be decomposed into other substances by chemical processes, it is
__________.
A) a heterogeneous mixture
B) an element
C) a homogeneous mixture
D) a compound
2) Which states of matter are significantly compressible?
A) gases only
B) liquids only
C) solids only
D) liquids and gases
3) Intensive properties __________ depend on the amount of matter present. Extensive
properties __________ depend on the amount of matter present.
A) do, don't
B) do, do
C) don't, don't
D) don't, do
4) The temperature of 25oC is __________ in Kelvins.
A) 103
B) 166
C) 248
5) 1 kilogram = __________ milligrams
A) 1,000,000
C) 1,000
D) 298
B) 10,000
D) 1 x 102
6) The density of silver is 10.5 g/cm3. What volume (cm3) would be occupied by a piece of
silver with a mass of 61.3 g?
A) 0.171
B) 5.84
C) 10.5
D) 0.00155
7) How many significant figures are there in the number 0.00230?
A) 2
B) 3
C) 5
D) 6
8) What is the correct answer (reported to the proper number of significant figures) to the
following?
6.3 x 3.25 = _____
A) 20
B) 20.475
C) 20.48
D) 20.5
9) 45 m/s = __________ km/hr
A) 2.7
B) 0.045
C) 1.6 x 102
D) 2.7 x 103
10) In which one of the following is the number correctly rounded to three significant figures?
A) 3.2550 3.25
B) 0.01832 0.018
C) 100 100
D) 10.25001 10.3
11) Which of the following is the same as 0.001 cm?
A) 0.01 mm
B) 0.01 dm
C) 0.01 m
D) 100 mm
12) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a
statement of __________.
A) the law of multiple proportions
B) the law of constant composition
C) the law of conservation of mass
D) the law of conservation of energy
13) The gold foil experiment performed in Rutherford's lab __________.
A) confirmed the plum-pudding model of the atom
B) led to the discovery of the atomic nucleus
C) was the basis for Thompson's model of the atom
D) utilized the deflection of beta particles by gold foil
14) Of the following, the smallest and lightest subatomic particle is the __________.
A) neutron
B) proton
C) electron
D) alpha particle
15)
16) In the periodic table, the rows are called __________ and the columns are called
__________.
A) octaves, groups
B) staffs, families
C) periods, groups
D) rows, groups
17) The element __________ is the most similar to strontium in chemical and physical
properties.
A) Li
B) At
C) Rb
D) Ba
18) An empirical formula always indicates __________.
A) which atoms are attached to which in a molecule
B) how many of each atom are in a molecule
C) the simplest whole-number ratio of different atoms in a compound
D) the geometry of a molecule
19) The charge on the manganese in the salt MnPO4 is __________.
A) -1
B) +1
C) +2
D) +3
20) Predict the empirical formula of the ionic compound that forms from magnesium and
oxygen.
A) Mg2O
B) MgO
C) MgO2
D) Mg2O2
21) Which species below is the sulfite ion?
A) SO2
B) SO32-
C) S2-
D) H2SO4
22) The correct formula for molybdenum(IV) perchlorate is __________.
A) Mo(ClO3)4
B) Mo(ClO)4
C) Mo(ClO2)4
D) Mo(ClO4)4
23) Which one of the following compounds is chromium(III) oxide?
A) Cr2O3
B) CrO3
C) Cr3O
D) Cr2O4
24) Of the reactions below, which one is not a combination reaction?
A) C + O2
CO2
B) N2 + 3 H2
2 NH3
C) CaO + H2O
Ca(OH)2
D) 2 CH4 + 4 O2
2 CO2 + 4 H2O
25) Of the reactions below, which one is a decomposition reaction?
A) NH4Cl
NH3 + HCl
B) N2 + 3 H2
2 NH3
C) 2 CH4 + 4 O2 2 CO2 + 4 H2O
D) Cd(NO3)2 + Na2S CdS + 2 NaNO3
Problems (SHOW ALL WORK ON THIS PAPER):
1. (10 points) The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6
mg/kg of body mass. Calculate the dose in milligrams for a 170-lb person. (1lb =
453.59g)
 453.59 g  1kg 
170lb
 = 77.11kg

 1lb  1000 g 
6mg
x
=
1kg 77.11kg
x = 462.7mg
= 463mg
2. (10 points) Complete the following table:
Symbol
52
Cr
40
Ca
193
Ir
Protons
24
20
77
Neutrons
28
20
116
Electrons
24
20
77
Mass Number
52
40
193
3. (5 points) Complete the following table:
Name
Formula
Chromium (III) Acetate
Cr(C2H3O2)3
Phosphoric Acid
H3PO4
Sodium Nitrate
NaNO3
Dinitrogen Tetroxide
N2O4
Ammonium Sulfate
(NH4)2SO4