Monday
December 22, 2014

Homework Help: Chemistry

Posted by Lance on Wednesday, April 4, 2012 at 12:59am.

A mixture of the compounds magnesium oxide and calcium sulfide contains 21.6999 g of magnesium oxide and is 51.3 % by mass magnesium oxide. The compound calcium sulfide is 44.400 % by mass sulfur. Calculate the moles of sulfur in the mixture.

I'm not sure what I did wrong.
My attempt:
21.6999g CaS2 / molar mass of CaS2 = 0.30079 mol

Answer: 0.285246979573 mol.

Thanks.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chem 2 - If we burn a strip of magnesium in air, there will be two main products...
intro to chemistry (college) - A 64.8 g mixture of the compounds potassium ...
Stiochiometry - Equation 2Mg+O2= 2MgO Lab data: Magnesium ribbon= .04 grams ...
chemistry - mass of dry crucible=34.69g mass of crucible with magnesium=34.68g ...
College Chemistry - A mixture of the compounds sodium oxide and magnesium ...
chemistry - A sample being given as a laboratory unknown is a mixture of calcium...
Chemistry - a 6 g sample of magnesium was burned in a crucible producing 10 g ...
Chemistry Lab MgO - If in Part B.2, the burning of the magnesium is uncontrolled...
Chemistry - Calcium carbonate is insoluble in water. Name two substances that ...
Chemistry - I had to perform an experiment using a coffee-cup calorimeter to ...

Search
Members