Determining sig figs

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MedhaVallurupalli1F
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Determining sig figs

Postby MedhaVallurupalli1F » Wed Jun 26, 2019 1:31 pm

Is there a difference in sig figs for 100g of something versus 100.g of something? How can you tell which numbers are significant?

Chem_Mod
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Re: Determining sig figs

Postby Chem_Mod » Wed Jun 26, 2019 2:13 pm

Yes, there is a difference. 100g of something only has one significant figure. 100.g of something has three significant figures. Zeros after a number are significant if there is a decimal point. Examples:
0.0100 --> three significant figures
0.01 --> one significant figure
100.0 --> four significant figures
1000 --> one significant figure

Kevin To 1B
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Re: Determining sig figs

Postby Kevin To 1B » Fri Jun 28, 2019 2:12 pm

The reason why 100 only has one significant figure is due to the fact that zeros that only hold places are not considered to be significant.

nicknavejas1B
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Re: Determining sig figs

Postby nicknavejas1B » Fri Jun 28, 2019 2:18 pm

I had this exact same question, thank you guys for the help!

Zachary Menz 1D
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Re: Determining sig figs

Postby Zachary Menz 1D » Sat Jun 29, 2019 3:48 pm

The difference is that 100 grams of something has 1 significant figure, while 100. grams of something has 3 significant figures. This is because the decimal point shows that the number is exact.

Sisi Li 1F
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Re: Determining sig figs

Postby Sisi Li 1F » Sat Jun 29, 2019 7:34 pm

Decimal points will tell you how precise a number we are measuring. Looking at the number 100, you don't really know for sure whether 100 is an estimate or not- perhaps it was obtained by rounding up or down from a different number, but you don't really know for sure. On the other hand, 100. tells you that the number is exactly 100 with no estimation. Hope that helps!

Yen Ho Chou 1D
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Re: Determining sig figs

Postby Yen Ho Chou 1D » Sun Jun 30, 2019 4:46 pm

There's no difference between 100g and 100.g, but there is a difference between 100g and 100.0g or 100.00g. The zeros that follow the decimal point are significant

Jeril Joseph 1B
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Re: Determining sig figs

Postby Jeril Joseph 1B » Wed Jul 03, 2019 4:18 pm

I have a question. So, if you are given a problem that has one value with 3 sig figs and another value of 4 sig figs, would you express your final answer using 3 or 4 sig figs? Would the amount of sig figs used change if there's more values given with 3 or 4 sig figs??? Sorry for asking.

Yasmin Olvera 1D
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Joined: Thu Feb 14, 2019 12:15 am

Re: Determining sig figs

Postby Yasmin Olvera 1D » Wed Jul 03, 2019 5:16 pm

I believe it would be 3 sig figs.

jlinwashington1B
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Re: Determining sig figs

Postby jlinwashington1B » Thu Jul 04, 2019 12:42 pm

Will the number of sig figs determine if our answer is correct or incorrect?

Haorui Li 1A
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Re: Determining sig figs

Postby Haorui Li 1A » Sat Jul 06, 2019 2:29 pm

I think if we don't have the correct sig. fig. the points will be deducted even if you have correct answers.


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