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May 29, 2015

Homework Help: Chemistry

Posted by Kristin on Friday, August 31, 2012 at 6:51pm.

A rock sample contains only Sb2S3 and FeS. If 835g of the sample contains 11.2% antimony, what is the mass percent of the Sb2S3 in the sample? What is the mass percent of the sulfur in the sample?

So far, I have determined that 11.2% of an 835g sample is 93.52g Sb, the molar mass of FeS is 87.92 g/mol and the molar mass of Sb2S3 is 339.73 g/mol. I have no idea where to go from here.

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