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Significant Figures.

  • Thread starter linuxux
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  • #1
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When i have a conversion fact such as,

[tex]6.45 mol H_{2\left(g\right)}\times\frac{2 mol HBr_{\left(g\right)}}{2 mol H_{2\left(g\right)} }= 12.9 mol HBr_{g}[/tex]

how many significant figure should the answer have?, im thinking one.
 
Last edited:

Answers and Replies

  • #2
cristo
Staff Emeritus
Science Advisor
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You've not written one sig fig though, you've written your answer with three. I would suggest to use 3 sig figs since the number of moles of hydrogen are accurate to 3 sig figs, and I presume that 2 is exactly two (i.e. 2.000), so giving 3 sig figs in the answer (like you've done; 12.9) will be as accurate as possible.
 
  • #3
133
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thanks cristo.
 

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