Thursday
August 21, 2014

Homework Help: chemistry

Posted by shelly on Saturday, November 28, 2009 at 1:37pm.

a compound with the molecular weight of 276 grams was determined to be 39.10% carbon, 8.77% hydrogen, and 52.13% oxygen. what is the empiricial formula and the molecular formula for the compound? i do not know where to start!

i worked it out and i got 276/100=2.76 do i round it up to 3? SO THE MOLECULAR FORMULA IS 3(ch30)? then i divided 39.10/12.01=3.25/3.25 =1 and the same for oxygen becaseu their answers were both the smallest. for hydrogen i divided 8.77/1.008=8.70/3.25=2.67 do you round up to 3? so the EMPIRICAL FORMULA is CH30 because you round up? or do i keep it as CH20? THANKS SO MUCH!!!!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - a compound with the molecular weight of 276 grams was determined to ...
Chemistry - Please check my answers for the following questions. THANK YOU. 1) ...
Chemistry - The molecular formula of a compound containg only carbon and ...
Chemistry - A certain compound contains carbon, hydrogen , and oxygen. When 1.00...
Chemistry - A certain compound contains carbon, hydrogen , and oxygen. When 1.00...
A.P Chemistry - Three volatile compounds X,Y, and Z each contain elements Q. The...
A.P. Chemistry - Three volatile compounds X,Y, and Z each contain elements Q. ...
Chemistry - Find the molecular formula of a compound that is 48.38% carbon, 8.12...
Chemistry - Calculate the empirical formula and molecular formula of a compound ...
Chemistry - I need some help with some of these questions: The action of ...

Search
Members