CHEM 1101 Lecture Notes - Lecture 8: Scientific Notation

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30 Apr 2018

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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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