CHEM 120 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS COMPREHENSIVE STUDY GUIDE.pdf

CHEM 120 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE

●● 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


●● multiplication and division
Answer: determined by the number with the fewest significant figures


●● addition and subtraction
Answer: determined by decimal place