CHEM 120 ACTUAL EXAM 2026 VERIFIED
QUESTIONS AND SOLUTIONS
◉scientific method. Answer: ways of learning that emphasizes
observation and experimentation (self correcting)
◉observation. Answer: we go out in nature and ask questions we
measure or observe some aspect of nature
◉hypothesis. Answer: tentative interpretation of an observation
◉law. Answer: summarizes a large number of observations
◉theory. Answer: model that explains and gives underlying causes
for observation
◉imprecise. Answer: quick and easy like color
◉precise. Answer: measuring and proving like numbers
◉scientific notation. Answer: 1x10^6
, ◉significant figures. Answer: indicates how good or bad a
measurement is
◉all non zeros are. Answer: significant
◉interior zeros. Answer: significant
◉trailing zeros before a decimal place. Answer: significant
◉trailing zeros after decimal place. Answer: significant
◉16.5400. Answer: 6 sig figs
◉130.. Answer: 3 sig figs
◉5003. Answer: 4 sig figs
◉exact numbers. Answer: unlimited sig figs
◉3. Answer: unlimited sig figs
QUESTIONS AND SOLUTIONS
◉scientific method. Answer: ways of learning that emphasizes
observation and experimentation (self correcting)
◉observation. Answer: we go out in nature and ask questions we
measure or observe some aspect of nature
◉hypothesis. Answer: tentative interpretation of an observation
◉law. Answer: summarizes a large number of observations
◉theory. Answer: model that explains and gives underlying causes
for observation
◉imprecise. Answer: quick and easy like color
◉precise. Answer: measuring and proving like numbers
◉scientific notation. Answer: 1x10^6
, ◉significant figures. Answer: indicates how good or bad a
measurement is
◉all non zeros are. Answer: significant
◉interior zeros. Answer: significant
◉trailing zeros before a decimal place. Answer: significant
◉trailing zeros after decimal place. Answer: significant
◉16.5400. Answer: 6 sig figs
◉130.. Answer: 3 sig figs
◉5003. Answer: 4 sig figs
◉exact numbers. Answer: unlimited sig figs
◉3. Answer: unlimited sig figs
