[LON-CAPA-users] parts per million as a unit

Tue, 10 Jul 2007 14:18:53 -0400

<div>I would also like to see it added; it is part of the New York State Hi=
gh School Chemistry curriculum. brew </div>-----lon-capa-users-admin@mail.lon-capa.org wrote: ----- <b=
lockquote style=3D"border-left: 2px solid rgb(0, 0, 0); padding-right: 0px;=
 padding-left: 5px; margin-left: 5px; margin-right: 0px;">To: &lt;lon-capa-=
users@mail.lon-capa.org&gt; From: "Robley Light" &lt;rlight@chem.fsu.edu=
&gt; Sent by: lon-capa-users-admin@mail.lon-capa.org Date: 07/10/2007=
 01:37PM Subject: [LON-CAPA-users] parts per million as a unit <f=
ont face=3D"monospace" size=3D"3">I gather that ppm is not an acceptable un=
it in LON-CAPA. &nbsp;Is that correct? (When I try to enter it as a unit=
, I get an error message that the computer answer is wrong, and either t=
he tolerance or the sig fig should be changed--even though the answer is=
 within both). Does anyone else think this is a feature we should ha=
ve (with, perhaps conversions to ppb,ppt and pph --parts per billion, pa=
rts per thousand and parts per hundred, or %), and conversions to, for e=
xample, mg/kg? &nbsp;It is easy enough to not include the unit in the an=
swer and just enter it outside the textbox. Robley *******=
****************************************************** Robley J. Light &=
nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Professor Emer=
itus of Chemistry and Biochemistry Department of Chemistry &nbsp; &nb=
sp; &nbsp; &nbsp; &nbsp;Phone: &nbsp; (850) 644-3844 &nbsp; and Biochem=
istry &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Email: &nbsp;rlight@c=
hem.fsu.edu &nbsp; Florida State University &nbsp; &nbsp; &nbsp; &nbsp; =
Fax: &nbsp; &nbsp; &nbsp;(850) 644-8281 Tallahassee, FL 32306-4390 &nbsp=
; &nbsp;Home Page: <a href=3D"http://www.chem.fsu.edu/editors/rlight">ht=
tp://www.chem.fsu.edu/editors/rlight</a> &nbsp; &nbsp; &nbsp; &nbsp; &=
nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -- This =
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