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Chapter 1: Chemistry: Matter and Measurement
Problem Solving Center
Self Quiz 2
Self Quiz 2
This activity contains 20 questions.
Which statement about elements is true?
Most of the elements have been known since the beginning of recorded history.
Artificially produced elements can be chemically transformed into naturally occurring elements.
There are more artificially produced elements than naturally occurring elements.
The discovery of all the naturally occurring elements led to the development of the periodic table.
Only one element of the 115 elements accounts for the majority of the mass of the universe.
The arrangement of elements in the modern periodic table places
elements with similar chemical properties in horizontal rows.
elements with identical physical properties in vertical columns.
the elements in 32 horizontal rows.
elements that are metals in groups that consist only of metals.
elements with similar chemical properties in vertical columns.
Which set of properties do Group 1A elements have in common?
They are gases, nonconductors, and chemically inert.
They are silvery in appearance, brittle, and good conductors.
They are malleable, good conductors, and silvery in appearance.
They are silvery in appearance, brittle, and poor conductors.
They are brightly colored, brittle, and poor conductors.
The determination that 18 g of water consists of 2 g of hydrogen and 16 g of oxygen is most likely the result of a/an
observation.
prediction.
hypothesis.
theory.
experiment.
Three elements can be characterized as follows: a yellow nonconductor, a silvery conductor, a silvery nonconductor. These elements are, respectively,
a metal, a semimetal, and a nonmetal.
a nonmetal, a semimetal, and a metal.
a metal, a nonmetal, and a semimetal.
a semimetal, a metal, and a nonmetal.
a nonmetal, metal, and a semimetal.
The group of elements referred to as the noble gases is unusual because
the elements have many colors.
the group contains a semimetal element at the bottom of the group.
their densities are high.
the reactivity of these elements is very low.
their conductivities are similar to that of gold.
Which of the following places the group of measurements in order from smallest to largest?
1 nL, 2 mL, 3 dL, 4 kL
1 Mg, 2 dg, 3 cg, 4 mg
1 ks, 2 ms, 3 Ms, 4 ns
1 cm, 2 dm, 3 km, 4 mm
1 dg, 2 mg, 3 cg, 4 pg
The average distance from the Earth to the Moon, 383,000,000 m, can also be expressed as
3.83 x 10
6
m.
3.83 x 10
8
.
3.83 x 10
11
km.
3.83 x 10
5
mm.
3.83 x 10
10
cm.
Which statement gives the correct relationship between units?
100 m < 1 cm
100 mg > 1 g
10 ks < 1000 s
10 mg < 1 dg
1000 mA < 1 nA
The mass of an object can be determined using a balance if
the weight of the object is less than the weight of the standard.
the mass of the balance is known.
the weight of the object is greater than the weight of the standard.
the volume of the object is equal to the volume of the standard.
the weight of the object is equal to the weight of the standard.
The volume of a bar of metal with the dimensions 2.0 m x 20 dm x 20 cm is
8.0 x 10
2
m
3
.
0.80 cm
3
.
8.0 x 10
5
m
3
.
8.0 x 10
2
dm
3
.
8.0 x 10
5
dm
3
.
Aspirin begins to melt at a temperature of 128 °C. Which temperature shows the correct temperature on the Kelvin or Fahrenheit scale for the melting point of aspirin?
173 °F is the melting point of aspirin.
401 °F is the melting point of aspirin.
262 °F is the melting point of aspirin.
-145 K is the melting point of aspirin.
53 °F is the melting point of aspirin.
A student performs an experiment to determine the freezing point of water. He/she obtains three values: -2.0 °C , -2.2 °C and -2.1 °C. The thermometer has a mark for each degree. Which statement is true?
The tenths place should not have been reported.
These values are accurate but not precise.
These values are accurate and precise.
These values are precise but not accurate.
The values are neither accurate nor precise.
The pairs of measurements that are the same are
1000 dm
3
= 1 L.
1 m
3
= 1 L.
0.001 m
3
= 0.1 L.
1000 cm
3
= 1 L.
100 cm
3
= 1 dm
3
.
A sample vial has a mass of 2.45781 g. A very small amount of an enzyme is placed in the vial. The mass of the enyzme and vial is 2.45783 g. The answer that gives the mass of the enzyme with the correct precision, that is, the correct number of significant figures is
2.0 x 10
-5
g.
0.02000 mg.
2.00000 x 10
-5
g.
2.0000 x 10
-5
g.
0.00002 g.
The set of numbers that has the same number of significant figures is
0.23030 cm, 283,004 m, 2,080,302 m.
4.230 x 10
2
g, 4203 g, 0.423 g.
4 x 10
-4
g, 8.0000 g, 0.00004 g.
2.350 x 10
2
g, 0.02350 g, 235.0 g.
1.002 g, 34.02 g, 0.034 cm.
If a block of iron has a volume of 101.3 cm
3
and a mass of 797.23 g, then its density is
7.87 g/cm
3
.
7.9 g/cm
3
.
7.8799901 g/cm
3
.
7.8700 g/cm
3
.
7.870 g/cm
3
.
If the following masses are added together, 12.3 g + 23.56 g + 0.00004 g + (1.00 x 10
3
g), then the answer should be reported as
1.0359 x 10
3
g.
1040 g.
1.03586004 x 10
3
g.
1.04 x 10
3
g.
1.03586 x 10
3
g.
Which property is an extensive, physical property of sugar?
Any sample of sugar can be broken down to give carbon, hydrogen, and oxygen.
The density of a 10-g sample of sugar is 1.58 g / cm
3
.
Sugar is a white solid.
The length of the edge of an average sugar crystal is less than 1 mm.
The melting point of sugar is 185 °C.
Substance A has a density of 2.0 g/cm
3
while substance B has a density of 4.0 g/cm
3
. Which statement correctly relates a sample of A to a sample of B?
If the sample of A has the same mass of a sample of B, then the volume of A is equal to the volume of B.
If a sample of A has the same volume as a sample of B, then the mass of A is twice the mass of B.
If a sample of A has twice the mass of a sample of B, then the volume of A is twice the volume of B.
If a sample of A has one-half the mass of a sample of B, then the volume of A is one-half the volume of B.
If a sample of A has twice the volume as a sample of B, then the mass of A is equal to the mass of B.
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