CHEM 121 EXAM 5 2026 STUDY GUIDE
COMPLETE QUESTIONS AND ANSWERS 100%
CORRECT
◉ Chemistry. Answer: the study of matter and how it changes
◉ Matter. Answer: anything that takes up space and has mass
◉ Element with examples. Answer: A pure substance that cannot be
separated, anything on the periodic table
◉ Compound. Answer: A substance made up of atoms of two or
more different elements joined by chemical bonds, CO2, NaCl
◉ homogenous mixture (solution). Answer: mixtures that are
uniform in composition
◉ heterogeneous mixture. Answer: A mixture that is not uniform in
composition; components are not evenly distributed throughout the
mixture
, ◉ Physical Properties. Answer: the characteristics of a substance
that can be observed or measured without changing the substance,
color, density, boiling/melting points, solubility, conductivity
◉ Chemical Properties. Answer: Characteristic that cannot be
observed without altering the substance, burning, rusting, reactivity
◉ physical change. Answer: A change in a substance that does not
involve a change in the identity of the substance
◉ chemical change. Answer: A change in matter that produces one
or more new substances
◉ How are mixtures seperated?. Answer: by physical processes such
as filteration, crystalation,simple distiliation, fractional distilation
and chromotograpghy.
◉ How are compounds seperated?. Answer: Only by chemical
reactions.
◉ Antimony. Answer: Sb
◉ Aluminum. Answer: Al
COMPLETE QUESTIONS AND ANSWERS 100%
CORRECT
◉ Chemistry. Answer: the study of matter and how it changes
◉ Matter. Answer: anything that takes up space and has mass
◉ Element with examples. Answer: A pure substance that cannot be
separated, anything on the periodic table
◉ Compound. Answer: A substance made up of atoms of two or
more different elements joined by chemical bonds, CO2, NaCl
◉ homogenous mixture (solution). Answer: mixtures that are
uniform in composition
◉ heterogeneous mixture. Answer: A mixture that is not uniform in
composition; components are not evenly distributed throughout the
mixture
, ◉ Physical Properties. Answer: the characteristics of a substance
that can be observed or measured without changing the substance,
color, density, boiling/melting points, solubility, conductivity
◉ Chemical Properties. Answer: Characteristic that cannot be
observed without altering the substance, burning, rusting, reactivity
◉ physical change. Answer: A change in a substance that does not
involve a change in the identity of the substance
◉ chemical change. Answer: A change in matter that produces one
or more new substances
◉ How are mixtures seperated?. Answer: by physical processes such
as filteration, crystalation,simple distiliation, fractional distilation
and chromotograpghy.
◉ How are compounds seperated?. Answer: Only by chemical
reactions.
◉ Antimony. Answer: Sb
◉ Aluminum. Answer: Al
