Units for lab writeups

Biology, Earth/Space Science, Chemistry, Physics, Computer Science, etc.
Forum Rules
By using the Wolfram Faculty Program Forum, you agree not to post any abusive, obscene, vulgar, slanderous, hateful, threatening, or sexually oriented material. Wolfram Faculty Program Forum administrators have the right to remove, edit, move or close any topic at any time should we see fit.

Personal Information: Posts in this forum may be viewed by non-members; however, the forum prohibits non-members from viewing your profile. Although your email address is hidden from both non-members and members, your account is initially configured to allow members to contact you via email through the forum. If you wish to hide your profile, or prohibit others from contacting you directly, you may change these settings by updating your profile through the User Control Panel.

Attachments: Attachments are not currently enabled on this forum. To share a file with others on this site, simply upload your file to the online storage service of your choice and include a link to the file within your post. If your school does not offer an online file storage and sharing service, the following sites provide free basic online file storage and sharing: Mozy, FilesAnywhere, Adrive, and KeepandShare.

Units for lab writeups

Postby gotwals » Tue Aug 31, 2010 5:04 pm

It's really important for kids doing labs to have units. I have questions about how to put units with numbers and then be able to do calculations with those variables.

For example:

molesAl = 0.631 g ((1 mol)/(massAl g))

0.0233864 mol

molesS = (1.750 g - 0.631 g) ((1 mol)/(massS g))

0.0348979 mol

moleratio = Max[{molesAl, molesS}]/Min[{molesAl, molesS}]

and I want this number to be a unitless ratio...

Max[0.0233864 mol, 0.0348979 mol]/Min[0.0233864 mol, 0.0348979 mol]
User avatar
gotwals
 
Posts: 2
Joined: Tue Mar 02, 2010 9:49 pm
Organization: NCSSM
Department: Chemistry

Re: Units for lab writeups

Postby Kathy_Bautista » Thu Sep 09, 2010 10:30 pm

Robert_Gotwals wrote:It's really important for kids doing labs to have units. I have questions about how to put units with numbers and then be able to do calculations with those variables.

For example:

molesAl = 0.631 g ((1 mol)/(massAl g))

0.0233864 mol

molesS = (1.750 g - 0.631 g) ((1 mol)/(massS g))

0.0348979 mol

moleratio = Max[{molesAl, molesS}]/Min[{molesAl, molesS}]

and I want this number to be a unitless ratio...

Max[0.0233864 mol, 0.0348979 mol]/Min[0.0233864 mol, 0.0348979 mol]


Hi Robert,

You can use the Units Package for this, which is built into Mathematica. The following loads the Units Package.

<< Units`

mol can be represented as Mole
g can be representaed as Gram

Here's a tutorial on using the Units Package:
http://reference.wolfram.com/mathematic ... Units.html

Let me know if I can be of further assistance.

-Kathy
Katherine Bautista
Senior Academic Program Manager
Wolfram Research, Inc.
http://www.wolfram.com
User avatar
Kathy_Bautista
Site Admin
 
Posts: 182
Joined: Fri Jul 31, 2009 6:24 pm
Location: Mesa, Arizona
Organization: Wolfram Research, Inc.
Department: Academic Initiatives


Return to Science and Technology (Primary/Secondary)

Who is online

Users browsing this forum: No registered users and 1 guest

cron