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April 16, 2014

Homework Help: chemistry

Posted by krystal on Saturday, February 11, 2012 at 2:32pm.

a. What is the molecular weight of aspirin (C9H8O4)?

180.1574 amu

b. What is the mass of 0.00785 mol of aspirin?

1.41 g

c. How many moles of aspirin are present in 100 mg of aspirin? Enter your answer in scientific notation.

5E-4 mol aspirin


d. How many molecules of aspirin are present in 5.00 g of aspirin? Enter your answer in scientific notation.

1.67E22 molecules aspirin

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