0's

Moderators: Chem_Mod, Chem_Admin

Matlynn Giles 1A
Posts: 37
Joined: Wed Sep 30, 2020 10:10 pm
Been upvoted: 1 time

0's

Postby Matlynn Giles 1A » Tue Oct 27, 2020 10:04 pm

Do the 0's following the decimal place count as SigFigs? For example the 2 0's after the decimal in 20.00.

Crystal Yu 3C
Posts: 92
Joined: Wed Sep 30, 2020 9:58 pm
Been upvoted: 12 times

Re: 0's

Postby Crystal Yu 3C » Tue Oct 27, 2020 10:06 pm

Yes, 20.00 has 4 sig figs.

Madeline Louie 1I
Posts: 44
Joined: Wed Sep 30, 2020 9:48 pm

Re: 0's

Postby Madeline Louie 1I » Tue Oct 27, 2020 10:09 pm

Yes, the significant figures do count because there is a decimal. However, if there was not a decimal and it was only 20, there would be one significant figure instead.

OwenSumter_3D
Posts: 41
Joined: Wed Sep 30, 2020 9:57 pm
Been upvoted: 2 times

Re: 0's

Postby OwenSumter_3D » Wed Oct 28, 2020 8:37 am

To provide a bit of reasoning why, sig figs are used to show how certain you are of a certain number. So if a certain number i.e. 20 has two zeroes after the decimal place, it means you are certain that it is 20.00 up to those two decimal places. Rather than if you only had 20, you would be certain only rounding to 20.

505352202
Posts: 47
Joined: Wed Sep 30, 2020 10:06 pm
Been upvoted: 1 time

Re: 0's

Postby 505352202 » Wed Oct 28, 2020 9:00 pm

So if we wanted to write 20.00 in scientific notation taking into account sig figs would it be 2.000 x 10^1? I thought trailing zeros were not significant

Stuti Pradhan 1B
Posts: 83
Joined: Wed Sep 30, 2020 9:32 pm
Been upvoted: 4 times

Re: 0's

Postby Stuti Pradhan 1B » Wed Oct 28, 2020 9:09 pm

Trailing zeros are not significant when there is no decimal point. For example, 200 would only have 1 sig fig because the trailing zeros are insignificant. However, since 2.000 x 10^1 has a decimal point, the zeros are significant. This is because 200 could be a rounded number or there is some other reason (maybe while taking measurements) that the number could not be found to more significant figures. However, a number such as 200. means that exactly 200 was measured. Similarly, in 2.000 x 10^1, the zeros at the end indicate that the measurement was found to the accuracy of 4 significant figures. That is why when there is a decimal, the zeros that follow are included when counting significant figures.

Hope this clarifies your question!

rita_debbaneh3D
Posts: 37
Joined: Wed Sep 30, 2020 9:57 pm

Re: 0's

Postby rita_debbaneh3D » Sun Nov 01, 2020 8:35 pm

When it comes to zeroes and decimals, all zeroes after a decimal point are significant. For example: 17.00. Also, when there are zeroes before a decimal point, they can be significant as long as they're "trailing" or the last kind of number in the value. For example: 170.00

Bai Rong Lin 3I
Posts: 36
Joined: Wed Sep 30, 2020 9:54 pm

Re: 0's

Postby Bai Rong Lin 3I » Sun Nov 01, 2020 11:00 pm

Matlynn Giles 1A wrote:Do the 0's following the decimal place count as SigFigs? For example the 2 0's after the decimal in 20.00.

Yes it does, in this case it would have 4 sig figs

George Hernandez 2J
Posts: 40
Joined: Wed Sep 30, 2020 9:52 pm

Re: 0's

Postby George Hernandez 2J » Sun Nov 01, 2020 11:12 pm

Trailing zeroes are not significant unless there is a decimal place. Otherwise, yes they are.

Tiffany Brownfield 3E
Posts: 35
Joined: Wed Sep 30, 2020 9:42 pm

Re: 0's

Postby Tiffany Brownfield 3E » Sun Nov 08, 2020 11:19 pm

Yes, the decimal signifies that the 0's are part of a precise measurement, that is, they had a tool of measurement that could measure accurately to that extent. Without the decimal point, we don't whether it's actually accurate or if it was simply rounded for conveniency.

Lillian
Posts: 36
Joined: Wed Sep 30, 2020 9:48 pm

Re: 0's

Postby Lillian » Mon Nov 09, 2020 12:13 am

Would the middle zeros have significance? like in 202.

Shalyn Kelly 1L
Posts: 35
Joined: Wed Sep 30, 2020 9:55 pm

Re: 0's

Postby Shalyn Kelly 1L » Mon Nov 09, 2020 1:38 am

In response to Lillian's question, I believe they would be counted because the "outer" numbers (2 & 2 in this case) enact the sigfig rules. So, if you have 9,104 you'd have four sig figs.

simona_krasnegor_1C
Posts: 36
Joined: Wed Sep 30, 2020 9:35 pm

Re: 0's

Postby simona_krasnegor_1C » Mon Nov 09, 2020 9:22 am

In response to Lillian, "inner-zeros" are indeed counted for sig figs.

305311217
Posts: 6
Joined: Wed Sep 30, 2020 9:38 pm

Re: 0's

Postby 305311217 » Sat Nov 14, 2020 10:22 pm

Yes, the zeros "shown" after the decimal would count. i.e. 20.00 would have 4 sig figs (-:

Michelle Nguyen 2C
Posts: 37
Joined: Wed Sep 30, 2020 10:03 pm

Re: 0's

Postby Michelle Nguyen 2C » Sun Nov 15, 2020 11:38 am

Trailing zeros after a decimal place count! 20.00 would count as 4 sig figs, but if there was no decimal place like 200, it would only be 1 sig fig

Simi Kapila_2L
Posts: 35
Joined: Wed Sep 30, 2020 9:40 pm
Been upvoted: 1 time

Re: 0's

Postby Simi Kapila_2L » Sun Nov 15, 2020 11:40 am

Yes they do count, you have 4 sig figs since the 0's come after the decimal place.

DPatel_2L
Posts: 30
Joined: Wed Sep 30, 2020 9:41 pm

Re: 0's

Postby DPatel_2L » Sun Nov 15, 2020 5:07 pm

Yes it would have 4 sig figs in this case.

Morgan Gee 1F
Posts: 35
Joined: Wed Sep 30, 2020 9:48 pm

Re: 0's

Postby Morgan Gee 1F » Sun Nov 15, 2020 8:50 pm

Any zero after decimal points are counted as a significant figure.

jasonfarrales2G
Posts: 36
Joined: Wed Sep 30, 2020 9:55 pm

Re: 0's

Postby jasonfarrales2G » Sun Nov 15, 2020 9:33 pm

If a decimal point appears in a number, then all of the zeros in that number are included in its total amount of sig figs. For example, 2000000 would only have 1 sig fig because the number contains no decimal point, while 20.00000 would have seven total sig figs since there is a decimal point.

905389581
Posts: 34
Joined: Wed Sep 30, 2020 10:11 pm

Re: 0's

Postby 905389581 » Sun Nov 15, 2020 9:34 pm

yes they are counted aftert the decimal


Return to “Significant Figures”

Who is online

Users browsing this forum: No registered users and 2 guests