Chemistry 103 Exam 1 Study Guide Questions And Answers Graded A+.
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Course
Chemistry 103
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Chemistry 103
Chemistry 103 Exam 1 Study Guide Questions And Answers Graded A+.
The Law of Definite Proportions states that in a given chemical compound, the elements are always combined in the same proportions by _______________ - correct answer. mass
The Law of Conservation of mass states that n...
Chemistry 103 Exam 1 Study Guide
Questions And Answers Graded A+.
The Law of Definite Proportions states that in a given chemical compound, the elements
are always combined in the same proportions by _______________ - correct answer.
mass
The Law of Conservation of mass states that no detectable gain or loss of mass occurs
in chemical reactions. Mass is _______________. - correct answer. conserved
Dalton's atomic theory states that matter consists of tiny particles called
_____________ - correct answer. atoms
Dalton's theory also states that atoms are ____________: in chemical reactions, atoms
can rearrange but they do not themselves break apart. - correct answer.
indestructable
Dalton's theory also states that in a given compound the constituent atoms are always
present in the same fixed numerical ____________ - correct answer. ratio
Electrons are ___________ charged, protons are ______________ charged, and
neutrons are _________________. - correct answer. negatively, positively, neutral
Electrons are much _______________ than protons and neutrons - correct answer.
smaller
Protons and neutrons are found within the _____________ of an atom - correct answer.
nucleus
In a neutral atom, the number of ____________ and _______________ must be equal.
- correct answer. protons, electrons
The atomic number f an atom = its number of _______________ - correct answer.
protons
the mass number of an atom = ___________+____________ - correct answer.
protons, neutrons
, Isotopes vary only in the number of ___________________ - correct answer.
neutrons
___________ is defined as anything that occupies space and has mass - correct
answer. matter
_______ refers to how much matter there is in a given object, whereas ___________
refers to the force with which the object is attracted by gravity - correct answer. mass,
weight
____________ ____________ are transformations that alter the chemical compositions
of substances - correct answer. chemical reactions
Substances that cannot be decomposed into simpler materials by chemical reactions
are called ____________ - correct answer. elements
Elements and compounds are examples of ________ ___________, the composition of
which is always the same, regardless of its source. - correct answer. pure substances
_____________ can have variable compositions - correct answer. Mixtures
A ________________ mixture has the same properties throughout the sample and is
called a ________________ - correct answer. homogeneous; solution
A ___________________ mixture consists of two or more regions, called
_____________ that differ in properties - correct answer. heterogeneous; phases
Formation or separation of a mixture into its components can be accomplished by a
_____________ change, which formation or decomposition of a compound takes place
by a ___________ change that changes the chemical makeup of the substances
involved. - correct answer. physical; chemical
A ________ property is one that can be observed without changing the chemical
makeup of a substance, while a ________ property describes how a substance
undergoes a chemical change/reaction. - correct answer. physical; chemical
____________ properties are independent of sample size, while ____________
properties depend on sample size. - correct answer. Intensive; extensive
What are the SI base units for length, mass, time, and temperature? - correct answer.
Length: Meter
Mass: Kilogram
Time: Second
Temperature: Kelvin
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