Multiplying/Dividing with Sig Figs

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jennifer_zhou2C
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Multiplying/Dividing with Sig Figs

Postby jennifer_zhou2C » Sun Oct 04, 2015 9:07 pm

When I use stoichiometry, I cross multiply and cancel in order to cancel out the units. Because of this I often divide or multiply by 1 unit integers. Does this mean when using significant figures, I have to round to 1 sig fig?

Krish Seth 2L
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

Re: Multiplying/Dividing with Sig Figs

Postby Krish Seth 2L » Sun Oct 04, 2015 9:13 pm

If a number is being counted, such as a ratio of 2H/H2O or 1000g/1kg, it does not factor in for significant figures. However, if it is a measured number such as 123.4g/mol, it is factored in.


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