The result of the following calculation has how many significant figures?(0.4333 J/g °C) (33.12°C - 31.12°C)(412.1 g)
3
How many significant figures are in the result of the calculation below?(4.321/2.8) × (6.9234 × 105)
2
Express 1230000 in scientific notation.
1.23 × 106
How many significant figures are in the number 4.00700 × 1013?
6
Express the number 178414 in scientific notation.
1.78414 × 105
How many significant figures are in the number 34.00500?
7
How many significant figures are in the number 123.00015?
8
Write the number 345.626 in scientific notation.
3.45626 × 102
How many significant figures are in the number 1.89 × 103?
3
Using the rules of significant figures, calculate the following:15.9743 - 3.02
12.95
How many significant figures are in the number 1.20 × 103?
3
How many significant figures are in the number 0.0040090?
5
Using the rules of significant figures, calculate the following:30 + 4.207
30
The number 200,000 expressed in scientific notation is
2 × 105
The number 3.00315 rounded to four significant figures is
3
Write the number 0.0005081 in scientific notation.
5.081 × 10-4
How many significant figures are in the number 10.050?
5
Express 0.005858 in scientific notation.
5.858 × 10-3
Express 30529000 in scientific notation.
3.0529 × 107
How many significant figures are in the number 19.8030?
6
How many significant figures are in the number 1000.0?
5
Write 8,323 in standard scientific notation.
8.323 × 103
How many significant figures are in the measurement 12.3004 g?
6
How many significant figures are in the number 3.400?
4
How many significant figures are in the number 60.02 x 105?
4
The number 14.809 rounded to three significant figures is _____.
14.8 ?
Convert: 0.00581 cm = ____________ mm.
5.81 × 10-2 mm
A person has a mass of 8.28 × 104 g. What is this person's mass in pounds?(1 kg = 2.2046 lb)
183. lb
A golfer putted a golf ball 7.5 ft across a green. How many inches does this represent?
90. in
How many quarts are in a 14.0-gal cooler of fruit punch? (1 gal = 4 qt)
56.0 qt
A toy measures 38.7 cm in length. How many inches does this represent?
15.2 in
A runner jogs 4.5 miles every morning. How many kilometers does this represent?
7.2 km
Convert 22.9 cm to inches (2.54 cm = 1 in).
9.02 in
Convert: -28.0°C = ______________ °F.
-18.4°F
If a 100.-g sample of a metal has a volume of 3.47 mL, what is the density of the metal?
28.8 g/mL
The Celsius equivalent of 195.7 K is
-77.3°C
A chemist needs 28.7 g of bromine for an experiment. What volume of bromine should the chemist use? (Density of bromine = 3.12 g/cm3)
9.20 mL
The density of an object that has a mass of 7.86 g and occupies a volume of 1.20 mL equals
6.55 g/mL
Convert: 82.7 °F = _____ K.
298.8
44.8°C is equal to
112.6°F
What is the Celsius equivalent of 948.2 K?
675.2°C
Convert: 19.5°C = ____________ °F.
67.1°F
If a 100.-g sample of platinum metal has a volume of 5 mL, what is the density of platinum in g/cm3?
21.4 g/cm3
254.6°F is equivalent to
123.7°C
Convert: -38.0°C = _____________ °F.
-36.4°F
The density of copper is 8.92 g/mL. The mass of a piece of copper that has a volume of 10.7 mL is
95.4 g
Water has a density of 1.0 g/mL. Which of these objects will float in water?Object I: mass = 50.0 g; volume = 53.1 mLObject II: mass = 71.7 g; volume = 51.4 mLObject III: mass = 100.0 g; volume = 50.0 mL
I only
What Kelvin temperature reading equals 69.9°F?
294.1 K
The measurement 3.8 x 103g could also be written as _____.
3.8 kg
Convert: 7.7 mm = _____ km.
7.7 × 10-6
Which of the following conversion factors is incorrect?
1 cm/2.54 in
Convert 683.8 L to milliliters.
6.838 × 105 mL
Convert: 97.0 mg = _______________ lb.
2.14 × 10-4 lb
Which SI prefix corresponds to a factor of 10-9?
nano
An iron sample has a mass of 2.71 lb. What is the mass of this sample in grams?
1.23 × 103 g
Scientific method
a process of studying natural phenomena that involves making observations, forming laws and theories and testing theories by experimentation
Natural law
a statement that expresses generally observed behavior
Hypothesis
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation
Theory
a set of assumptions put forth to explain some aspect of the observed behavior of matter
A set of tested hypotheses that gives an overall explanation of some part of nature, is called a(n)
theory
Which of the following is an example of a qualitative observation?
The plant is short.
A quantitative observation
contains a number and a unit
Which of the following is an example of a quantitative observation?
The temperature of the liquid is 60 °C.
A __________ is a summary of observed behavior, and a __________ is an explanation of behavior.
law, theory
Generally, observed behavior that can be formulated into a statement, sometimes mathematical in nature, is called a(n)
natural law
Which of the following is not a step in the scientific method?
Change results to agree with your hypothesis.
The statement "The total mass of materials is not affected by a chemical change in the materials" is called a(n) _____.
natural law
Science
the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment
Chemistry
the science that deals with the materials of the universe and the changes that these materials undergo
A quantitative observation is called a measurement. Is this statement true or false?
True
Something done to test a hypothesis that produces new observations is called a(n)
experiment
The volume (in milliliters) occupied by 49.7 g of mercury (density = 13.6 g/mL) is
3.65 mL
What volume would be occupied by a piece of aluminum (density = 2.70 g/mL) weighing 67.7 g?
25.1 mL
An experiment requires 52.5 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm3, what is the mass of 52.5 mL of ethyl alcohol?
41.5 g
Cesium melts at 302 K and boils at 944 K. What would be the physical state of cesium at 25°C?
Solid
Copper has a density of 8.96 g/cm3. If a cylinder of copper weighing 20.92 g is dropped into a graduated cylinder containing 20.00 mL of water, what will be the new water level?
22.33 mL
Which of the following conversion factors is incorrect?
1 yd/1.094 m
Which of the following conversion factors is incorrect?
1 cg = 100 g
Convert: 844.7 qt = ____________ mL.
7.969 × 105 mL
2.7 kilograms contain this many grams.
2.7 × 103
Convert 0.084 ft3 to liters (28.32 L = 1 ft3).
2.4 L
Your friend is 5.0 ft, 8.2 in tall. What is your friend's height in meters?
1.7 m
Baking soda and vinegar are mixed in a balloon. A gas is produced, and the balloon expands to a volume of 4.70 L. What is the volume of the balloon in cm3?
4.70 × 103 cm3
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