CHEM 211 ACS EXAM FINAL
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Physical properties - ANS the characteristics of a substance that can be observed or
measured without changing the substance
- color
- melting point
-electrical conducivity
- density
physical change - ANS A change in a substance that does not involve a change in the identity
or composition of the substance
Chemical properties - ANS A characteristic of a substance that appears as it interacts with, or
transforms into, other substances.
- flammability
- corrisiveness
- reactivity with acids
chemical change/reaction - ANS A change in which one or more substances are converted
into one or more substances with different composition and properties.
1 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
, Energy - ANS the ability to do work, to move matter.
Potential energy - ANS the energy an object has as a result of its position relative to other
objects or because of its composition.
Kinetic energy - ANS the energy an object has in motion.
what are the two concepts central to energy? - ANS 1. when energy is converted from one
form to another, it is conserved, not destroyed.
2. situations of lower energy are more stable and are favored over situations of higher energy,
which are less stable. Low energy > high energy
scientific method - ANS a process of creative proposals and testing aimed at objective,
verifiable discoveries of the cause of natural events.
- observation
- hypothesis
- experiment
- model (theory)
- further experiment
SI units - ANS A unit composed of one or more of the base units of the Système International
d'Unités, a revised form of the metric system.
celsius scale - ANS freezing point: 0 C
boiling point: 100 C
2 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Physical properties - ANS the characteristics of a substance that can be observed or
measured without changing the substance
- color
- melting point
-electrical conducivity
- density
physical change - ANS A change in a substance that does not involve a change in the identity
or composition of the substance
Chemical properties - ANS A characteristic of a substance that appears as it interacts with, or
transforms into, other substances.
- flammability
- corrisiveness
- reactivity with acids
chemical change/reaction - ANS A change in which one or more substances are converted
into one or more substances with different composition and properties.
1 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
, Energy - ANS the ability to do work, to move matter.
Potential energy - ANS the energy an object has as a result of its position relative to other
objects or because of its composition.
Kinetic energy - ANS the energy an object has in motion.
what are the two concepts central to energy? - ANS 1. when energy is converted from one
form to another, it is conserved, not destroyed.
2. situations of lower energy are more stable and are favored over situations of higher energy,
which are less stable. Low energy > high energy
scientific method - ANS a process of creative proposals and testing aimed at objective,
verifiable discoveries of the cause of natural events.
- observation
- hypothesis
- experiment
- model (theory)
- further experiment
SI units - ANS A unit composed of one or more of the base units of the Système International
d'Unités, a revised form of the metric system.
celsius scale - ANS freezing point: 0 C
boiling point: 100 C
2 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
