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CHEM 101-Straighterline Exam 1 With Complete Solution 100% Verified.
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CHEM 101-Straighterline Exam 1 With CompleteSolution 100% Verified
A 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. - Correct Answer - gas
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. - Correct Answer - liquid
A substance in which the atoms or molecules are fixed at a specific position. It exhibits a fixed volume
and rigid shape. - Correct Answer - solid
A solid that has atoms and molecules in a repeatable pattern. - Correct Answer - crystalline solid
A solid whose atoms or molecules are not arranged in a specific pattern. - Correct Answer - amorphous
solid
A substance does not vary its composition within the substance nor between samples of the same
substance. - Correct Answer - pure substance
A physical combination of substances in which each substance keeps its own physical and chemical
properties. - Correct Answer - mixture
A physical combination of substances of non-uniform composition. - Correct Answer - heterogeneous
mixture
A physical combination of substances of uniform composition. - Correct Answer - homogeneous mixture
A pure substance that cannot be broken into component parts. Examples include helium, nitrogen, and
oxygen. - Correct Answer - element
A pure substance made up of two or more elements. - Correct Answer - compound
A quantitative observation. - Correct Answer - measurement
Any division of a quantity that may be used in a measurement. - Correct Answer - unit
, The SI unit for length. - Correct Answer - meter
The SI unit for time. - Correct Answer - second
The SI unit for mass. - Correct Answer - kilogram
The standard unit of measurement used to count atoms. - Correct Answer - mole
A unit system abbreviated as SI that is used by scientists. - Correct Answer - International System of
Units
A unit system of measurement used throughout the world. - Correct Answer - metric system
A unit system of measurement mainly used in the United States. - Correct Answer - english system
Changes the SI unit by a power of 10. - Correct Answer - prefix multiplier
An English temperature unit system used mainly in the United States. - Correct Answer - fahrenheit
A combination of SI units. - Correct Answer - derived units
A metric temperature unit system used throughout the world. - Correct Answer - celsius
A derived unit defined as mass/volume. - Correct Answer - density
A property that does not depend on the amount of a substance. - Correct Answer - intensive property
A property that depends on the amount of a substance. - Correct Answer - extensive property
A measurement that is repeatable in an experimental setup, within an acceptable range of error. -
Correct Answer - reliable measurements
How close a series of measurements are to each other. - Correct Answer - precision
How close a series of measurements are to the actual value. - Correct Answer - accuracy
A non-place-holding digit in any numerical measurement. - Correct Answer - significant digit
Rounding numerical data to the nearest power of 10 for rapid estimated calculations. - Correct Answer -
order-of-magnitude estimation
The force that holds atoms together in molecules and materials. - Correct Answer - chemical bond
A bond between two or more atoms in which the electrons are shared. - Correct Answer - covalent
bond
A bond between two or more atoms in which the electrons reside primarily in one atom. - Correct
Answer - ionic bond
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