CHEM 1101 Lecture Notes - Lecture 8: Scientific Notation

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Logarithms/Natural logarithms:
Determine the number of sig figs in the original value
Keep this many decimal places in the calculated log or ln (can add zeroes)
Keep digits in front of decimal as non significant digits
Taking antilogs & antilns:
• The number of sig figs after the decimal place represents the total number of sig figs in the
calculated result
Be careful with scientific notation
Exact Numbers:
Numbers that are counted
Numbers that serve as mathematical operators (1/392.6)
Numbers that are defined (exactly 2.54cm in inch)
Unit prefix conversion (kilo is exactly 1000)
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