CHM 111 Exam 1 Chapter 1 and 2|156 Questions with Verified Answers,100% CORRECT
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Course
CHM 111
Institution
CHM 111
CHM 111 Exam 1 Chapter 1 and 2|156 Questions with Verified Answers
Chemistry - CORRECT ANSWER the study of matter and the changes that matter undergoes.
Matter - CORRECT ANSWER anything that has mass and occupies space
the scientific method - CORRECT ANSWER gather data via observations and...
CHM 111 Exam 1 Chapter 1 and 2|156 Questions with
Verified Answers
Chemistry - CORRECT ANSWER the study of matter and the changes that matter
undergoes.
Matter - CORRECT ANSWER anything that has mass and occupies space
the scientific method - CORRECT ANSWER gather data via observations and
experiments, identify patterns or trends in the collected data, summarize their
findings with a law, formulate a hypothesis, with time a hypothesis may involve
into a theory
observations - CORRECT ANSWER natural phenomena and measured events ( can
be stated as a law)
experiment - CORRECT ANSWER procedure to test hypothesis; measures one
variable at a time
model (theory) - CORRECT ANSWER conceptual assumptions that explains data
from accumulated experiments, predicts related phenomena
further experiment - CORRECT ANSWER tests predictions based on model
substance or a mixture - CORRECT ANSWER chemists classify matter as either a
_______________ or a ______________ of substances
substance - CORRECT ANSWER a form of matter that has a definite composition
and distinct properties, can either be elements or compounds; differ from one
another in composition and may be identified by appearance, smell, taste, and
other properties; can exist as a solid, liquid, or gas.
,condensed phases - CORRECT ANSWER solids and liquids are referred to
collectively as the _______________ _______________.
chemical composition - CORRECT ANSWER the three states of matter can be
interconverted without changing the _____________ ____________ of the
substance.
solids - CORRECT ANSWER ________ have particles that are held closely together
in an ordered fashion.
liquid - CORRECT ANSWER particles in a ________ are close together but are not
held rigidly in position.
gas - CORRECT ANSWER particles in a _______ have significant separation from
each other and move freely.
elements - CORRECT ANSWER a substance that cannot be separated into simpler
substances by chemical means, may consist of atoms or molecules, can combine
with other elements to form compounds
compound - CORRECT ANSWER a substance composed of two or more elements
chemically united in fixed proportions, cannot be separated into simpler
substances by any physical process. may consists of molecules or ions
chemical reaction - CORRECT ANSWER separation of a compound into its
constituent elements requires a ____________ _____________.
mixture - CORRECT ANSWER a physical combination of two or more substances,
can be separated by physical means into pure components without changing the
identities of the components
homogenous mixture - CORRECT ANSWER a uniform mixture throughout
heterogeneous mixture - CORRECT ANSWER is not a uniform mixture throughout
quantitative properties - CORRECT ANSWER properties that can be measured
, unit - CORRECT ANSWER a measured quantity must always include a ______.
international system of units - CORRECT ANSWER the revised metric system is
called the _____________________________ and was designed for universal use
by scientists.
Celsius (C) and Kevin (K) Scale - CORRECT ANSWER the two temperature scales
used in chemistry
meter cubed (m^3) - CORRECT ANSWER the derived unit for volume is the
__________.
Liter (L) - CORRECT ANSWER a more practical unit for volume is the __________.
density - CORRECT ANSWER the ________ of a substance is the ratio of mass to
volume.
kg/m^3 - CORRECT ANSWER the derived unit for density is _________.
quantitative and qualitative - CORRECT ANSWER the two general types of
properties of matter
physical property - CORRECT ANSWER property that can be observed and
measured without changing the identity of the substance ex: color, melting point,
boiling point
physical change - CORRECT ANSWER a change in which the state of matter
changes, but the identity of the matter does not change ex: changes of state
(solid, liquid, gas)
chemical property - CORRECT ANSWER when a substance exhibits as it interacts
with another substance ex: flammability, corrosiveness
chemical change - CORRECT ANSWER change that results in a change of
composition; the original substances no longer exist. ex: digestion, combustion,
oxidation
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