Wednesday
April 23, 2014

Homework Help: Chemistry

Posted by Natalie on Friday, December 30, 2011 at 11:07am.

1) A compound has the following percentages by mass: barium, 58.84%; sulfur, 13.74%; oxygen, 27.43%. Determine the empirical formula of the compound.

2) If a 1.271-g sample of aluminum metal is heated on a chlorine gas atmosphere, the mass of aluminum chloride produced is 6.280 g. Calculate the empirical formula of aluminum chloride.

I don't understand these at all, could you at least help explain them/push me in the right direction on how to accomplish these?

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