40. versus 40
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Re: 40. versus 40
Yes, the decimal point makes the first one 2 sig figs and the lack of it makes the second one one sig fig.
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Re: 40. versus 40
Here is a useful summary of the sig. fig. rules I found online:
1. All non-zero numbers ARE significant.
2. Zeros between two non-zero digits ARE significant.
3. Leading zeros are NOT significant.
4. Trailing zeros to the right of the decimal ARE significant.
5. Trailing zeros in a whole number with the decimal shown ARE significant.
6. Trailing zeros in a whole number with no decimal shown are NOT significant.
Based on these rules, your answer is correct.
1. All non-zero numbers ARE significant.
2. Zeros between two non-zero digits ARE significant.
3. Leading zeros are NOT significant.
4. Trailing zeros to the right of the decimal ARE significant.
5. Trailing zeros in a whole number with the decimal shown ARE significant.
6. Trailing zeros in a whole number with no decimal shown are NOT significant.
Based on these rules, your answer is correct.
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Re: 40. versus 40
Yes, that's correct! On Lavelle's website, he has a cheat sheet on the rules of sig figs that you might find helpful.
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Re: 40. versus 40
Trailing zeroes are never significant unless a decimal is present. So yes you are correct since it is for 40.
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Re: 40. versus 40
I agree with the posts above, the decimal creates another significant figure because of its specific rule.
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Re: 40. versus 40
Except when the 0s in decimals are considered, whole values with 0s are not accounted for as a signifcant figure.
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Re: 40. versus 40
Yes! When decimals are included, it means that you count everything before and after them. 40.0 would have 3 sig figs, and 40. would have two. 4.0 would also have 2.
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Re: 40. versus 40
Hi! Here's the link to Dr. Lavelle's sig fig cheat sheet you can find on his website.
https://lavelle.chem.ucla.edu/wp-conten ... OUT_SF.pdf
https://lavelle.chem.ucla.edu/wp-conten ... OUT_SF.pdf
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Re: 40. versus 40
Yup! Zeroes at the end of a digit (trailing zeros) are only significant if there is a decimal point present.
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Re: 40. versus 40
Yes. This is because anything to the left of a decimal point is counted as a sig fig while trailing zeros, with no decimals, are not considered significant
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Re: 40. versus 40
Yes, you are correct. Any digit to the left of a decimal is counted towards being a sig dig
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Re: 40. versus 40
Yes, because the decimal in 40. denotes that the 0 adds to the precision. Because of the lack of decimal in 40, we are unsure if the 0 is precise or not.
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Re: 40. versus 40
The decimal makes 40. have two sigfigs. Without the decimal it just has one sigfig.
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Re: 40. versus 40
I agree with the post above. Trailing zeros cannot count unless there is a decimal .
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Re: 40. versus 40
Yes because, without a decimal present, ending zeros are not counted as significant digits
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Re: 40. versus 40
Yes! 40. has 2 numbers in front of the decimal while 40 is only one sigfig because the zeros after don't count. That summary will be pretty helpful^^
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