CHEM 103 UWL EXAM 1 QUESTIONS WITH
CORRECT ANSWERS 2026
Matter - CORRECT ANSWER -anything that takes up space and has mass
Elements - CORRECT ANSWER -matter is composed of what?
Atoms - CORRECT ANSWER -submicroscopic particles, fundamental building blocks of matter,
when two or more attach in a specific shape they become molecules
Composition and the structural arrangement of atoms - CORRECT ANSWER -properties of
matter are dependent on what two things?
Physical state (s, l, g) and composition (element, compound, mixture) - CORRECT ANSWER -how
do we classify matter?
Gas - CORRECT ANSWER -no fixed volume or shape, expands to fill volume and shape of
container, compressible
Liquid - CORRECT ANSWER -distilled volume (independent of container), no specific shape, fills
the shape of the portion it occupies, incompressible
Solids - CORRECT ANSWER -definite shape and volume, incompressible
Pure substance - CORRECT ANSWER -matter WITHOUT variable composition
Pure substances (matter without variable composition) - CORRECT ANSWER -invariable
composition from sample to sample, uniform characteristics/properties
, Compound - CORRECT ANSWER -a pure substance that is separable into similar substances
Element - CORRECT ANSWER -a pure substance that is not separable into similar substances
Mixture - CORRECT ANSWER -matter with variable composition
Mixture - CORRECT ANSWER -variable composition and composed of multiple components,
nonuniform characteristics/properties
Heterogeneous and homogeneous - CORRECT ANSWER -what are the two types of mixtures?
Heterogeneous - CORRECT ANSWER -nonuniform throughout (ex- paint, wet sand)
Homogeneous - CORRECT ANSWER -uniform throughout (ex- kool aid, wine)
Separate - CORRECT ANSWER -each component retains its individual chemical and physical
properties then the difference in those properties can be used to ______________
Distillation, filtration, evaporation, etc. - CORRECT ANSWER -examples of separation
Physical properties - CORRECT ANSWER -w/o change in composition, freezing point, odor, color
Chemical properties - CORRECT ANSWER -describe composition and reactivity, flammability
Physical changes - CORRECT ANSWER -occurs without composition change, phase changes,
boiling of water
CORRECT ANSWERS 2026
Matter - CORRECT ANSWER -anything that takes up space and has mass
Elements - CORRECT ANSWER -matter is composed of what?
Atoms - CORRECT ANSWER -submicroscopic particles, fundamental building blocks of matter,
when two or more attach in a specific shape they become molecules
Composition and the structural arrangement of atoms - CORRECT ANSWER -properties of
matter are dependent on what two things?
Physical state (s, l, g) and composition (element, compound, mixture) - CORRECT ANSWER -how
do we classify matter?
Gas - CORRECT ANSWER -no fixed volume or shape, expands to fill volume and shape of
container, compressible
Liquid - CORRECT ANSWER -distilled volume (independent of container), no specific shape, fills
the shape of the portion it occupies, incompressible
Solids - CORRECT ANSWER -definite shape and volume, incompressible
Pure substance - CORRECT ANSWER -matter WITHOUT variable composition
Pure substances (matter without variable composition) - CORRECT ANSWER -invariable
composition from sample to sample, uniform characteristics/properties
, Compound - CORRECT ANSWER -a pure substance that is separable into similar substances
Element - CORRECT ANSWER -a pure substance that is not separable into similar substances
Mixture - CORRECT ANSWER -matter with variable composition
Mixture - CORRECT ANSWER -variable composition and composed of multiple components,
nonuniform characteristics/properties
Heterogeneous and homogeneous - CORRECT ANSWER -what are the two types of mixtures?
Heterogeneous - CORRECT ANSWER -nonuniform throughout (ex- paint, wet sand)
Homogeneous - CORRECT ANSWER -uniform throughout (ex- kool aid, wine)
Separate - CORRECT ANSWER -each component retains its individual chemical and physical
properties then the difference in those properties can be used to ______________
Distillation, filtration, evaporation, etc. - CORRECT ANSWER -examples of separation
Physical properties - CORRECT ANSWER -w/o change in composition, freezing point, odor, color
Chemical properties - CORRECT ANSWER -describe composition and reactivity, flammability
Physical changes - CORRECT ANSWER -occurs without composition change, phase changes,
boiling of water
