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May 22, 2015

Homework Help: Chemistry

Posted by Anonymous on Sunday, September 9, 2007 at 6:07pm.

Sorry to bother again. I'm stuck in these two problems as well.
1. A 27.0 g smaple of an unknown hydrocarbon was burned in excess oxygen to form 88.0 g of carbon dioxide and 27.0 g of water. What iss a possible molecular formula of the hydrocarbon?
2. A sample of CaCO3 was reported as being 30% Ca. Assuming no Ca was present in any impurities, the % of CaCO3 in the sample is...
thanks.

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