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Measurements and Calculations
Measurements and Calculations
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High school chemistry over units in measurement, significant figures, scientific notation, density.
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Answers
1
Round seven thousand cm to one significant figure using scientific notation.
7x103 cm
7.0x103 cm
7000. cm
7000 cm
2
The SI unit for measuring volume is
square meter
milliliter
cubic centimeter
cubic meter
3
If a metal has a mass of 45.65g and a volume of 16.9 cm
3
, calculate its density.
0.37 g/cm3
2.7 g/cm3
0.370 g/cm3
2.70 g/cm3
4
The unit g/cm
3
measures
volume
mass
area
density
5
How many significant figures in the measurement 0.0020 m?
5
4
1
2
6
Combinations of SI base units form
derived units
conversion factors
equalities
non-SI units
7
Which is not a part of the scientific method?
analyzing data
making an educated guess
making measurements
introducing bias
8
53 + 48.26 =
1.0x102
101.3
101.26
101
9
Which of the following measurements contains 3 significant figures?
200.0 mL
20.2 mL
200 mL
0.02 mL
10
The SI base unit for measuring luminous intensity is
kelvin.
mole.
candela.
ampere.
11
The SI base unit for measuring mass is
meter
gram
kilogram
mole
12
The accuracy of a measurement
is something scientists rarely achieve.
indicates that the measurement is also precise.
is how close it is to the accepted value.
does not depend on the instrument used.
13
52.18 g + 1.7572 g =
53.93
53.9
53.9372
53.94
14
All measurements in science
have some degree of uncertainty.
are both accurate and precise.
must include only digits known with certainty.
must be expressed in scientific notation.
15
Find the mass of a sample with a volume of 55.1 mL and a density of 6.72 g/mL.
370 g
0.122 g
370. g
8.20 g
16
How many significant figures in the measurement 10.0500 g?
6
4
7
3
17
The SI base unit for measuring length is
gram
meter
ampere
second
18
The amount of space occupied by an object is
volume
area
matter
mass
19
The unit J measures
amount of substance.
mass.
luminous intensity.
energy.
20
The closeness of a set of measurements made in the same way refers to
measurement
accuracy
precision
system
21
How many significant figures in the measurement 7000 g?
3
4
0
1
22
Write the number seven thousand with three significant figures.
7000
7.00x103
7000.
700.
23
Convert 23 465 mg to grams.
23.465 g
0.23465 g
234.65 g
2.3465 g
24
Which mass is the largest?
2000 pg
0.020 kg
20.0 mg
0.200 g
25
Of the following instruments, which measures with least precision?
graduated cylinder
buret
the all have the same precision
beaker
