GENERAL CHEMISTRY EXAM
QUESTIONS AND ANSWERS
Hypothesis - Correct Answers -An educated guess based on observations, previous
knowledge and intuition
Experimentation - Correct Answers -Observations taken under conditions that we can
control so we can ask specific questions
Data - Correct Answers -Observations obtained from an experiment
Theory - Correct Answers -A well tested conclusion that can be confirmed through
further information
Law - Correct Answers -A very consistent behavior that has universal validity
What is Matter? - Correct Answers -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.
How do we classify Matter? - Correct Answers -We classify matter by its physical state:
-Solid: fixed shapes and volumes
-Liquid: variable shapes and fixed volumes
-Gas: variable shapes and volumes
Pure Substance - Correct Answers -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
Mixtures - Correct Answers -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)
Elements - Correct Answers -A substance that cannot be broken down into simpler
substances even by a chemical reaction. Separated further into metals and nonmetals.
QUESTIONS AND ANSWERS
Hypothesis - Correct Answers -An educated guess based on observations, previous
knowledge and intuition
Experimentation - Correct Answers -Observations taken under conditions that we can
control so we can ask specific questions
Data - Correct Answers -Observations obtained from an experiment
Theory - Correct Answers -A well tested conclusion that can be confirmed through
further information
Law - Correct Answers -A very consistent behavior that has universal validity
What is Matter? - Correct Answers -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.
How do we classify Matter? - Correct Answers -We classify matter by its physical state:
-Solid: fixed shapes and volumes
-Liquid: variable shapes and fixed volumes
-Gas: variable shapes and volumes
Pure Substance - Correct Answers -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
Mixtures - Correct Answers -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)
Elements - Correct Answers -A substance that cannot be broken down into simpler
substances even by a chemical reaction. Separated further into metals and nonmetals.
