Clarification for SI Units

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Lizette Noriega 1H
Posts: 105
Joined: Wed Sep 18, 2019 12:15 am

Clarification for SI Units

Postby Lizette Noriega 1H » Thu Oct 03, 2019 3:26 pm

Hello, I just want some clarification on SI units and I want to make sure that I've written the correct prefixes for each conversion. Also, is it required to know all of them? In which cases would it be necessary to use such unit conversions? Thanks!

G - giga 10^9
M - mega 10^6
k - kilo 10^3
d - deci 10^-1
c - centi 10^-2
m - milli 10^-3
u [Greek] - micro 10^-6
n - nano 10^-9
p - pico 10^-12

Jamie Lee 1H
Posts: 54
Joined: Fri Aug 09, 2019 12:15 am

Re: Clarification for SI Units

Postby Jamie Lee 1H » Thu Oct 03, 2019 3:32 pm

Pico, nano, milli, centi, kilo are the common ones used. These are necessary to use when the problems are given in a unit value other than the standard meter, liter, or second. If given in something other than meter, liter, or second then you would use these values to convert them before starting the problem. Also, sometimes, problems are asked to have an answer in picometers, for example, so you would need to know these conversions to arrive at the right answer. You should know those ones, for sure, the other ones aren't necessarily used as often in chemistry.

Kyle Thorin
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

Re: Clarification for SI Units

Postby Kyle Thorin » Thu Oct 03, 2019 4:14 pm

Dr. Lavelle also mentioned that Angstrom (Å) is often used in chemistry, which is equivalent to 10^(-10) m

Jesalynne 2F
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Clarification for SI Units

Postby Jesalynne 2F » Thu Oct 03, 2019 6:29 pm

You wrote the correct prefixes for each conversion :) and I think to be safe you should know them in order to convert during tests, midterms, etc. in case it is required. Also, Dr. Lavelle mentioned that in chemistry we won't be using the larger units, like giga, often.

Mariah
Posts: 104
Joined: Fri Aug 02, 2019 12:16 am

Re: Clarification for SI Units

Postby Mariah » Thu Oct 03, 2019 8:33 pm

You definitely wrote all of these correct! Although it might not be REQUIRED to have them memorized, I would advise it. They will come up in topics other than chem as well, and its good fundamental knowledge for STEM classes and such.


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