Homework Help: Chemistry

Posted by Jo on Monday, April 23, 2012 at 9:18pm.

Find the molecular formula of a compound that is 48.38% carbon, 8.12% hydrogen, and 53.5% oxygen by mass and has a molecular weight of 328 g/mol.

Chemistry - DrBob222, Monday, April 23, 2012 at 9:30pm
Take a 100 g sample to give you
48.38 g C
8.12 g H
53.5 g O.
Convert grams to mols. mols = grams/molar mass
uh oh! Percent adds up to more than 100% (110% to be exact about it). You must have made a typo or the problem is printed wrong. My best educated guess is that 53.5% O should be 43.5% O.

Answer this Question

Related Questions

Chemistry - Please check my answers for the following questions. THANK YOU. 1) ...
Chemistry - Calculate the empirical formula and molecular formula of a compound ...
Chemistry - A certain compound containing only carbon and hydrogen was found to ...
chemistry - A 25g sample of a compound composed of Carbon, Hydrogen, and Oxygen ...
Chemistry - The molecular formula of a compound containg only carbon and ...
Finding the Molecular Formula - A certain compound containing only carbon and ...
chemistry - A 12.0g sample of carbohydrate contain 4.50g of carbon, 3.25g of ...
chemistry - a compound with the molecular weight of 276 grams was determined to ...
chemistry - Fumaric acid, which occurs in many plants, contains, by mass, 41.4% ...
Chemistry - 0.717 g of a compound containing carbon, hydrogen, and oxygen is ...

For Further Reading

First Name:
School Subject:
Answer: