Sig Figs

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Sydni Stewart
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Joined: Fri Sep 28, 2018 12:29 am
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Sig Figs

Postby Sydni Stewart » Sun Oct 14, 2018 12:44 pm

In a question that does not give sig figs, do we just make our own?

Chem_Mod
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Re: Sig Figs

Postby Chem_Mod » Sun Oct 14, 2018 1:06 pm

The numbers given in the question should define how many sig figs you use.

JulieAljamal1E
Posts: 71
Joined: Fri Sep 28, 2018 12:24 am

Re: Sig Figs

Postby JulieAljamal1E » Sun Oct 14, 2018 1:48 pm

Whatever numbers are given in the problem allow you to determine sig figs. If you are multiplying or dividing numbers, you limit your sig figs to the smallest number of sig figs in the calculation. If it is addition or subtraction, you limit sig figs to the term in your calculation with the smallest number of digits after the decimal point.

Isabelle_Maletz_3E
Posts: 27
Joined: Fri Apr 06, 2018 11:03 am

Re: Sig Figs

Postby Isabelle_Maletz_3E » Sun Oct 14, 2018 4:39 pm

A couple things to keep in mind when determining how many sig figs are in a given number are: all nonzero digits are significant, leading zeros are not significant and captive zeros are significant. Hope this helps!

Lasya Gudipudi 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Sig Figs

Postby Lasya Gudipudi 1A » Sun Oct 14, 2018 5:14 pm

I remember that I came across a question that listed no numbers, so I was told to use 4 significant figures. The answer in the book also listed 4 sig figs, so I would use 4 sig figs if no numbers were given.

NatBrown1I
Posts: 62
Joined: Fri Sep 28, 2018 12:17 am

Re: Sig Figs

Postby NatBrown1I » Sun Oct 14, 2018 11:30 pm

You just go with the values you see that have the least amount of significant figures.

For example, if you have a question that involves calculations with the numbers 1.3005 and 7.69, then you would do the entire question and all the calculations without rounding until you get the answer- to which you would see that 7.69 has the lowest number of significant figures (3) and would round the answer to 3 significant figures as well.

Tyler Vu 4I
Posts: 30
Joined: Fri Sep 28, 2018 12:27 am

Re: Sig Figs

Postby Tyler Vu 4I » Wed Oct 24, 2018 12:03 pm

The question will give a value or values of something with sig figs. The lowest number of sig figs in the given value(s) should be used for the answer.

Tony Chung 2I
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Sig Figs

Postby Tony Chung 2I » Fri Oct 26, 2018 1:58 am

Always use the amount of sig figs that they give you in the question.

Richard Ku 4H
Posts: 29
Joined: Fri Oct 05, 2018 12:16 am

Re: Sig Figs

Postby Richard Ku 4H » Fri Oct 26, 2018 2:05 am

You round your answer to the lowest number of significant figures that are present in the given numerical values from the question.


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