GENERAL CHEMISTRY EXAM STUDY GUIDE 4
1. Hypothesis ANS An educated guess based on observations, previous knowledge and
intuition-
2.Experimentation ANS Observations taken under conditions that we can control so we
can ask specific questions
3.Data ANS Observations obtained from an experiment
4.Theory ANS A well tested conclusion that can be confirmed through further information-
5.Law ANS A very consistent behavior that has universal validity
6.What is Matter? ANS Matter is anything that has mass and occupies space. We can
describe matter in terms of physical properties, those characteristics that can be
determined without changing the chemical composition of matter (shape, color, texture,
shine, odor, taste.) and mass, volume, density, temperature.
7.How do we classify Matter? ANS We classify matter by its physical state:
-Solid: fixed shapes and volumes
-Liquid: variable shapes and fixed volumes
-Gas: variable shapes and volumes
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, GENERAL CHEMISTRY EXAM STUDY GUIDE 4
8.Pure Substance ANS Pure substances have the same chemical composition throughout,
and from sample to sample. It can also be classified as either elements or compounds
(Cannot be separated by purely physical means.)
There are two kinds of pure substance: elements and compounds:
9. Mixtures ANS A combination of two or more elements or compounds. They differ from
pure compounds in that their components can be separated by physical processes.
(i.e: pencil lead, salt water, Air):
10. Elements ANS A substance that cannot be broken down into simpler substances
even by a chemical reaction. Separated further into metals and nonmetals.
11. Compounds ANS A substance composed of two or more different elements
combined in definite proportions.
12. Homogeneous Mixtures ANS Consists of two or more substances but has the same
composition throughout and often called a solution (i.e. salt water)
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1. Hypothesis ANS An educated guess based on observations, previous knowledge and
intuition-
2.Experimentation ANS Observations taken under conditions that we can control so we
can ask specific questions
3.Data ANS Observations obtained from an experiment
4.Theory ANS A well tested conclusion that can be confirmed through further information-
5.Law ANS A very consistent behavior that has universal validity
6.What is Matter? ANS Matter is anything that has mass and occupies space. We can
describe matter in terms of physical properties, those characteristics that can be
determined without changing the chemical composition of matter (shape, color, texture,
shine, odor, taste.) and mass, volume, density, temperature.
7.How do we classify Matter? ANS We classify matter by its physical state:
-Solid: fixed shapes and volumes
-Liquid: variable shapes and fixed volumes
-Gas: variable shapes and volumes
1/9
, GENERAL CHEMISTRY EXAM STUDY GUIDE 4
8.Pure Substance ANS Pure substances have the same chemical composition throughout,
and from sample to sample. It can also be classified as either elements or compounds
(Cannot be separated by purely physical means.)
There are two kinds of pure substance: elements and compounds:
9. Mixtures ANS A combination of two or more elements or compounds. They differ from
pure compounds in that their components can be separated by physical processes.
(i.e: pencil lead, salt water, Air):
10. Elements ANS A substance that cannot be broken down into simpler substances
even by a chemical reaction. Separated further into metals and nonmetals.
11. Compounds ANS A substance composed of two or more different elements
combined in definite proportions.
12. Homogeneous Mixtures ANS Consists of two or more substances but has the same
composition throughout and often called a solution (i.e. salt water)
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