CHEM 120 FINAL EXAM STUDY GUIDE QUESTIONS AND ANSWERS GRADED A+ 2025/2026

CHEM 120 FINAL EXAM STUDY GUIDE
QUESTIONS AND ANSWERS GRADED A+
2025/2026




Chemistry - ANS the science that tries to understand how matter behaves by studying how
atoms and molecules behave


scientific method - ANS ways of learning that emphasizes observation and experimentation
(self correcting)


observation - ANS we go out in nature and ask questions we measure or observe some
aspect of nature


hypothesis - ANS tentative interpretation of an observation


law - ANS summarizes a large number of observations


theory - ANS model that explains and gives underlying causes for observation


imprecise - ANS quick and easy like color


precise - ANS measuring and proving like numbers



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, scientific notation - ANS 1x10^6


significant figures - ANS indicates how good or bad a measurement is


all non zeros are - ANS significant


interior zeros - ANS significant


trailing zeros before a decimal place - ANS significant


trailing zeros after decimal place - ANS significant


16.5400 - ANS 6 sig figs


130. - ANS 3 sig figs


5003 - ANS 4 sig figs


exact numbers - ANS unlimited sig figs


3 - ANS unlimited sig figs


multiplication and division - ANS determined by the number with the fewest significant
figures


addition and subtraction - ANS determined by decimal place


tera - ANS T 10^12

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