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April 20, 2014

Homework Help: Chemistry

Posted by anonymous on Wednesday, August 1, 2007 at 8:12am.

Can some please check my answers for the following questions? THANK YOU.

1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin?
ANSWER: 45 g

2)The gram molecular mass of oxygen is.
ANSWER: 16.0 g

3)What is the mass, in grams, of 3.01 x 10^23 molecules of water?
ANSWER: 9.00 grams

2) No. Oxygen is naturally occuring as a molecule, O2, molecular mass 32

1) No. Mole mass of asprin is much more, close to 180 grams per mole. Recalculate.

3) yes.

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