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CHM 1025 - Exam 1 Review – 96 Questions and answers
CHM 1025 - Exam 1 Review – 96 Questions and answers
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CHM 1025 - Exam 1 Review – 96Questions and answers
chemistry - -the study of composition, structure, properties, and reactions of
matter
-matter - -anything that occupies space and mass which can be classified
by state and by composition
-organic chemsitry - -study of substances that contain the element carbon
-biological chemistry - -study of chemical reactions that take place in
biological systems
-geochemistry - -study of chemical composition of ores, soils, and minerals
of the surface of the Earth and other planets
-physical chemistry - -study of the physical nature of chemical systems,
which include energy changes
-scientific method - -a general approach that scientists use to solve
problems, comprising of four main parts; observations, hypothesis,
experiment, theory
-qualitative observations - -such things as color change or bubbling
-quantitative observations - -observations that can be measured
numerically as data
-hypothesis - -a proposed explanation of an observation made
-experiment - -a set of procedural steps used to test the hypothesis
-scientific theory - -allows you to predict behavior based on your
experiment snd describes the underlying cause of physical behavior
-scientific law - -a brief statement that summarized past observations and
predicts future ones
-precision - -depends on the number of times you get the same result
-accuracy - -depends on the degree of closeness to the actual value
-thermal energy - -energy due to a change in temperature
, -scientific notation - -a way to write very large or very small numbers into
manageable terms
-solid - -has a fixed shape and volume, which is incompressible
-liquid - -variable shape with a fixed volume and is incompressible
-gas - -has a variable shape with variable volume and is compressible
-composition of matter - -can be broken down into a pure substance or
mixture
-pure substance - -a substance containing only one type of atom or
molecule
-element - -a pure substance containing only one kind of atom
-compound - -a pure substance made up of two or more
elements/molecules
-mixture - -a substance composed of two or more different types of atoms
or molecules that can be combined in variable proportions
-heterogeneous mixture - -a solution mixed unevenly throughout the
solution
-homogeneous mixture - -a solution mixed evenly throughout the solution
-physical properties - -describe the appearance of the type of matter
-extensive property - -depends on the amount of a substance present
-intensive property - -does not depend on the amount of the substance
present
-chemical property - -one that a substance displays only by changing its
composition via a chemical change
-physical change - -occurs when you only change the state of the substance
and not the identity of the substance
-chemical change - -occurs when a reaction occurs; when you change the
chemical make up of the substance from what you started with
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