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Chemistry 1211 Exam 1 (chapter 1, 2, 3.1)
Questions and Correct Answers/ Latest
Update / Already Graded
Chemistry definition
Ans: The srudy of matter, its transformations, and how it
behaves
matter definition
Ans: The physical substance that occupies space and has mass
Where do chemical transformations take place
Ans: Atomic and molecular level
macroscopic scale
Ans: Working with things you can see with the naked eye
What scale do chemist work with?
Ans: Atomic scale, nanoscale, molecular scale
Atom
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Ans: The smallest indivisible unit of an element
Chemical compound
Ans: A substance formed when 2 or more elements are
combined in a defined ratio
Pure substance
Ans: Contains only one type of element or compound and has a
fixed chemical composition. Has measurable qualities that are
independent of the sample size
Physical properties (of a chemical substance)
Ans: These properties don't change the chemical composition
of the material when they are measured
Name some physical properties (8)
Ans: Physical state. Color, viscosity (resistance to flow),
opacity, density, conductivity, melting and boiling points
In a solid, do the molecules move past each other?
Ans: No
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Can all materials exist in all 3 physical states
Ans: No
Physical change
Ans: A change in the physical property of a substance; doesn't
change the chemical composition
Chemical properties of a substance
Ans: Those that involve a chemical change in the material and
often involve a substance interacting with other chemicals
A chemical change
Ans: A change in the chemical composition of the material
Mixture
Ans: A substance made up of two or more elements or
compounds that have not reacted chemically
homogenous mixture
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Ans: Mixture that has a constant composition throughout the
material
Heterogeneous mixture
Ans: A mix in which the composition is not uniform
Matter can be divided into what 2 substances (physical processes)
Ans: Pure substances, mixtures
pure substances can be separated into what 2 groups
Ans: (Chemical reactions) elements, compounds
Mixture can be broken down into what 2 groups
Ans: Homogenous mixtures or solutions, heterogenous
mixtures
What are the scientific units
Ans: SI units
SI unit for length
All rights reserved © 2025/ 2026 |
Chemistry 1211 Exam 1 (chapter 1, 2, 3.1)
Questions and Correct Answers/ Latest
Update / Already Graded
Chemistry definition
Ans: The srudy of matter, its transformations, and how it
behaves
matter definition
Ans: The physical substance that occupies space and has mass
Where do chemical transformations take place
Ans: Atomic and molecular level
macroscopic scale
Ans: Working with things you can see with the naked eye
What scale do chemist work with?
Ans: Atomic scale, nanoscale, molecular scale
Atom
All rights reserved © 2025/ 2026 |
, Page |2
Ans: The smallest indivisible unit of an element
Chemical compound
Ans: A substance formed when 2 or more elements are
combined in a defined ratio
Pure substance
Ans: Contains only one type of element or compound and has a
fixed chemical composition. Has measurable qualities that are
independent of the sample size
Physical properties (of a chemical substance)
Ans: These properties don't change the chemical composition
of the material when they are measured
Name some physical properties (8)
Ans: Physical state. Color, viscosity (resistance to flow),
opacity, density, conductivity, melting and boiling points
In a solid, do the molecules move past each other?
Ans: No
All rights reserved © 2025/ 2026 |
, Page |3
Can all materials exist in all 3 physical states
Ans: No
Physical change
Ans: A change in the physical property of a substance; doesn't
change the chemical composition
Chemical properties of a substance
Ans: Those that involve a chemical change in the material and
often involve a substance interacting with other chemicals
A chemical change
Ans: A change in the chemical composition of the material
Mixture
Ans: A substance made up of two or more elements or
compounds that have not reacted chemically
homogenous mixture
All rights reserved © 2025/ 2026 |
, Page |4
Ans: Mixture that has a constant composition throughout the
material
Heterogeneous mixture
Ans: A mix in which the composition is not uniform
Matter can be divided into what 2 substances (physical processes)
Ans: Pure substances, mixtures
pure substances can be separated into what 2 groups
Ans: (Chemical reactions) elements, compounds
Mixture can be broken down into what 2 groups
Ans: Homogenous mixtures or solutions, heterogenous
mixtures
What are the scientific units
Ans: SI units
SI unit for length
All rights reserved © 2025/ 2026 |
