PORTAGE LEARNING CHEM 210 MODULE 1 ACTUAL EXAM SCRIPT 2026 COMPLETE QUESTIONS AND ANSWERS

PORTAGE LEARNING CHEM 210 MODULE 1
ACTUAL EXAM SCRIPT 2026 COMPLETE
QUESTIONS AND ANSWERS

◉ significant figures in a reported value. Answer: all nonzero digits
and zeros that require thought


◉ leading zeros. Answer: not measured and never significant


These are zeros that appear in front of nonzero numbers in
measurements less than 1


◉ captive zeros. Answer: always measured and always significant


these are zeros that appear between two nonzero numbers


◉ trailing zeros. Answer: may or may not be part of the
measurement


These are that appear after all nonzero numbers

, ◉ trailing zeros are significant if.... Answer: the number contains a
decimal point


◉ trailing zeros are NOT significant if.... Answer: the number does
NOT contain a decimal point


◉ how to find the number of significant figures in a given
measurement. Answer: start with the first nonzero digit on the left,
count the remaining digits to the right, only include trailing zeros if
there is a decimal point


◉ significant figures in ordinary and exponential notation. Answer:
the number of significant figures should remain the same


◉ Addition or subtraction
(Determining significant figures in answer). Answer: least number of
decimal places


round the result to the same number of decimal places as the
number with the least number of decimal places


◉ multiplication or division
(Determining significant figures in answer). Answer: least number of
significant figures