Significant Figures  [ENDORSED]

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Michelle Dong 1F
Posts: 110
Joined: Fri Sep 29, 2017 7:04 am

Significant Figures

Postby Michelle Dong 1F » Mon Dec 04, 2017 9:12 am

How many places can we be off by (according to the official answer) to still get full credit? For example, if my answer is 115*10^-9 m, but the answer in the answer key is 116*10^-9 m, will I still get full credit?

Gurpreet Khamba 1J
Posts: 18
Joined: Fri Sep 29, 2017 7:04 am

Re: Significant Figures

Postby Gurpreet Khamba 1J » Mon Dec 04, 2017 10:14 am

To get a value lower than the actual makes me believe that you rounded values as you continued solving. Significant figures comes into play at the end, once the answer is determined. I do not believe you will get full credit because of that but perhaps you will only lose one point.

Lily Guo 1D
Posts: 64
Joined: Fri Sep 29, 2017 7:03 am

Re: Significant Figures

Postby Lily Guo 1D » Mon Dec 04, 2017 11:08 am

I'm not sure if you would get full credit, but try to round as little as possible in the course of solving the problem until you get to the very end so that your answer is as correct as possible.

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Re: Significant Figures  [ENDORSED]

Postby Chem_Mod » Mon Dec 04, 2017 2:32 pm

Yes, it is important to round at the end rather than in the midst of the problem. However, because that number is so small, it's very possible to end up with a slightly different answer, so I would say it's okay. What is most important is that you are doing the work correctly. If the answer is within 1%, you should be fine.

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