1|Page
WGU D425 CHEMESTRY TEST EXAM –
INTRODUCTION TO CHEMISTRY WITH
QUESTIONS AND 100% CORRECT ANSWERS||
LATEST AND COMPLETE VERSION 2025 2026
WITH EXPERT VERIFIED SOLUTIONS||
ASSURED PASS
How is matter classified?
pure substances and mixtures
Avogadro's number
number of representative particles in a mole, 6.02 X 10^23
Words like atom, particles, molecules, formula units mean?
use Avogadro's number 6.02x10^23
Imperial System
the system of measurement used in the United States
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What is an element?
A substance that cannot be broken down into simpler substances
What is an compound?
pure substance that contains more than one element and can be broken
down into chemically simpler components
What is a mixture?
is a physical blend of two or more pure substances where each retains its
own identity and properties in the mixture
What are the three phases of matter?
solid, liquid, gas
What is matter composed of?
atoms
How is energy transferred?
heat and work
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What is the motion of energy?
kinetic energy
what is resting energy?
potential energy
What is a molecule ?
a group of two or more atoms held together by chemical bonds
Is matter affected by physical changes?
physical changes DO NOT alter the composition of matter
Is matter affected by chemical changes ?
Chemical changes transform matter in such a way that the identity or
chemical substance changes
WGU D425 CHEMESTRY TEST EXAM –
INTRODUCTION TO CHEMISTRY WITH
QUESTIONS AND 100% CORRECT ANSWERS||
LATEST AND COMPLETE VERSION 2025 2026
WITH EXPERT VERIFIED SOLUTIONS||
ASSURED PASS
How is matter classified?
pure substances and mixtures
Avogadro's number
number of representative particles in a mole, 6.02 X 10^23
Words like atom, particles, molecules, formula units mean?
use Avogadro's number 6.02x10^23
Imperial System
the system of measurement used in the United States
,2|Page
What is an element?
A substance that cannot be broken down into simpler substances
What is an compound?
pure substance that contains more than one element and can be broken
down into chemically simpler components
What is a mixture?
is a physical blend of two or more pure substances where each retains its
own identity and properties in the mixture
What are the three phases of matter?
solid, liquid, gas
What is matter composed of?
atoms
How is energy transferred?
heat and work
, 3|Page
What is the motion of energy?
kinetic energy
what is resting energy?
potential energy
What is a molecule ?
a group of two or more atoms held together by chemical bonds
Is matter affected by physical changes?
physical changes DO NOT alter the composition of matter
Is matter affected by chemical changes ?
Chemical changes transform matter in such a way that the identity or
chemical substance changes
