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CHEM 101-Straighterline Exam 1 Questions and Answers 2024
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CHEM 101-Straighterline Exam 1
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CHEM 101-Straighterline Exam 1A substance in which the atoms or molecules are free to move relative to one another. It
always assumes the shape and volume of its container. - answergas
A substance in which the atoms or molecules pack closer than a gas, but are still able to
freely move relative to one another. It exhibits a fixed volume, but not a fixed shape. -
answerliquid
A substance in which the atoms or molecules are fixed at a specific position. It exhibits
a fixed volume and rigid shape. - answersolid
A solid that has atoms and molecules in a repeatable pattern. - answercrystalline solid
A solid whose atoms or molecules are not arranged in a specific pattern. -
answeramorphous solid
A substance does not vary its composition within the substance nor between samples of
the same substance. - answerpure substance
A physical combination of substances in which each substance keeps its own physical
and chemical properties. - answermixture
A physical combination of substances of non-uniform composition. -
answerheterogeneous mixture
A physical combination of substances of uniform composition. - answerhomogeneous
mixture
A pure substance that cannot be broken into component parts. Examples include
helium, nitrogen, and oxygen. - answerelement
A pure substance made up of two or more elements. - answercompound
A quantitative observation. - answermeasurement
Any division of a quantity that may be used in a measurement. - answerunit
The SI unit for length. - answermeter
The SI unit for time. - answersecond
, The SI unit for mass. - answerkilogram
The standard unit of measurement used to count atoms. - answermole
A unit system abbreviated as SI that is used by scientists. - answerInternational System
of Units
A unit system of measurement used throughout the world. - answermetric system
A unit system of measurement mainly used in the United States. - answerenglish
system
Changes the SI unit by a power of 10. - answerprefix multiplier
An English temperature unit system used mainly in the United States. -
answerfahrenheit
A combination of SI units. - answerderived units
A metric temperature unit system used throughout the world. - answercelsius
A derived unit defined as mass/volume. - answerdensity
A property that does not depend on the amount of a substance. - answerintensive
property
A property that depends on the amount of a substance. - answerextensive property
A measurement that is repeatable in an experimental setup, within an acceptable range
of error. - answerreliable measurements
How close a series of measurements are to each other. - answerprecision
How close a series of measurements are to the actual value. - answeraccuracy
A non-place-holding digit in any numerical measurement. - answersignificant digit
Rounding numerical data to the nearest power of 10 for rapid estimated calculations. -
answerorder-of-magnitude estimation
The force that holds atoms together in molecules and materials. - answerchemical bond
A bond between two or more atoms in which the electrons are shared. - answercovalent
bond
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