Basic Rules for Sig Figs

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JuliaStone 3K
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Joined: Fri Sep 26, 2014 2:02 pm

Basic Rules for Sig Figs

Postby JuliaStone 3K » Thu Oct 09, 2014 12:27 pm

I never learned significant figures in high school so can someone please give me a basic rundown of all the important rules for significant figures?

Chem_Mod
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Re: Basic Rules for Sig Figs

Postby Chem_Mod » Thu Oct 09, 2014 12:44 pm

There is a helpful document on Sig Figs on the 14A class website, entitled "Everything you want to know about Sig Fig", it is one of the links in the course materials section.

804584179
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Joined: Fri Sep 25, 2015 3:00 am

Re: Basic Rules for Sig Figs

Postby 804584179 » Thu Oct 01, 2015 7:36 pm

I never learned the rules either, can someone explain?

Jana Sandhu 3J
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Basic Rules for Sig Figs

Postby Jana Sandhu 3J » Thu Oct 01, 2015 8:59 pm

-Zeros that are only used to set a decimal point are NOT significant (e.g. 0.0005 has 1 sig fig, as does 2000)
-Zeros in between two integers ARE significant (e.g. 6067 has 4 sig figs)
-Zeros trailing after a decimal ARE significant (e.g. 6067.300 has 7 sig figs)
-100 has 1 sig fig, but 100. has 3 sig figs
-When adding and subtracting, round your answer to the least decimal places you started with
-When multiplying and dividing, round your answer to the least sig figs you started with


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