chem chapter one review
1 milligram = ________ micrograms
1,000
In which one of the following numbers are all of the zeros significant?
100.090090
1 nanometer = ________ picometers
1000
Convert 1 cm3 to Å3.
10e^24
How many significant figures should be retained in the result of the following calculation?12.00000 × 0.9893 + 13.00335 × 0.0107
4
A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What is the density of the object determined to an appropriate number of significant figures?
7.859 × 10-1 g/mL
Which of the following mass measurements is the smallest? 78 pg 78 ng 78 kg 78 fg 78 mg
78 fg
Which one of the following has the element name and symbol correctly matched?
Be, beryllium
Cu is the symbol for the element ________.
Copper
Mass and volume are often referred to as ________ properties of substances.
Extensive
There are 6 significant figures in the number 0.003702.
False
Water is considered to be a diatomic molecule because it is composed of two different atoms.
False
Which one of the following has the element name and symbol correctly matched?
Fe, iron
The SI unit of temperature is ________.
K
________ is the abbreviation for the prefix mega-.
M
The symbol for the element phosphorus is ________.
P
Sn is the symbol for the element ________.
Tin
A scientific law is a concise statement or an equation that summarizes a broad variety of observations.
True
Temperature is a physical property that determines the direction of heat flow.
True
Which of the following is an illustration of the law of constant composition?
Water is 11% hydrogen and 89% oxygen by mass.
If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a(n) ________.
compound
Solids have a ________ shape and are ________.
definite, incompressible
A separation process that depends on differing abilities of substances to form gases is called ________.
distillation
If matter is uniform throughout and cannot be separated into other substances by physical means, it is ________.
either an element or a compound
Which one of the following is a pure substance?
elemental oxygen
Which states of matter are significantly compressible?
gases only
In the following list, only ________ is not an example of matter.
heat
A combination of sand, salt, and water is an example of a ________.
heterogeneous mixture
Precision refers to ________.
how close a measured number is to other measured numbers
Accuracy refers to ________.
how close a measured number is to the true value
Gases and liquids share the property of ________.
indefinite shape
The SI unit for mass is ________.
kilogram
________ is the abbreviation for the prefix milli-.
m
Which one of the following is not an intensive property?
mass
Expressing a number in scientific notation ________.
removes ambiguity as to the significant figures
Which of the following is not an exact number?
the number of liters in a gallon
3.2 cm3 = 0.0032 L
true
Gases do not have a fixed ________ as they are able to be ________. Enter answer as first blank, (single space) second word. for example: first, second
volume, compressed
1.035 × 10-4 L = ________ mL
0.1035
