Exam (elaborations)
CHM LAB 1025 Lab midterm Exam/11 Questions with Answers
CHM LAB 1025 Lab midterm Exam/11 Questions with Answers
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CHM LAB 1025 Lab midterm Exam/11Questions with Answers
Density formula - -D= M/v
-Element - -smallest part of matter
-compound - -represented by formulas
-mixture - -Any substance that has a uniform and unchanging composition
is considered to be pure. Examples of pure substances include elements. A
mixture is a combination of two or more pure substances in which each pure
substance retains its individual chemical properties.
-physical change - -Any change that occurs without altering the chemical
composition of a substance is a physical change.
Physical changes can include changing the color, shape, state of matter, or
volume of a substance.
-chemical change - -Chemical changes occur when a substance combines
with another to form a new substance
-physical property - -Physical properties include: appearance, texture, color,
odor, melting point, boiling point, density, solubility, polarity, and many
others.
-chemical property - -a property or characteristic of a substance that is
observed during a reaction in which the chemical composition or identity of
the substance is changed.
EX. Combustibility
-heterogeneous - -distinct layers or phases
-homogenous - -keeps same properties throughout
-common equipment items - -graduated cylinder, buret, ect., Print out
diagram
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