help! help! help! please...

Chemistry and homework help forum.

Organic Chemistry, Analytical Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Theoretical Chemistry, High School Chemistry, Colledge Chemistry and University Chemistry Forum.

Share your chemistry ideas, discuss chemical problems, ask for help with scientific chemistry questions, inspire others by your chemistry vision!

Please feel free to start a scientific chemistry discussion here!

Discuss chemistry homework problems with experts!

Ask for help with chemical questions and help others with your chemistry knowledge!

Moderators: Xen, expert, ChenBeier

Post Reply
chemn00b
Newbie
Newbie
Posts: 1
Joined: Tue Dec 04, 2007 8:01 pm

help! help! help! please...

Post by chemn00b »

How many molecules of aspirin (C9 H8 O4 ) are
there in a 166 mg tablet of aspirin? Answer
in units of molec.

explain how you got it please
Top
User avatar
peter
Sr. Staff Member
Sr. Staff Member
Posts: 164
Joined: Thu May 18, 2006 7:41 pm

Post by peter »

First you divide mass of aspirin by its' molecular mass which can be found with this nice tool:
http://www.webqc.org/mmcalc.php
and then multiply the number of moles by the Avogadro number.
Chemistry Legend
Top
Post Reply

Return to “Chemistry forum”