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Topic: Stoichiometry question. Calculating Amount of Atoms.  (Read 3620 times)

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Offline tinypleco

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Stoichiometry question. Calculating Amount of Atoms.
« on: March 14, 2009, 05:46:57 PM »
Hey everyone, I have a couple questions that look like this:

"The empirical formula of styrene is CH; the molar mass of styrene is 104.14 g/mol. What number of H atoms are present in a 4.50 g sample of styrene?"

You don't need to fully solve it for me. I just need to know the process. Thank you so much for any help that you can give me.

Offline Arkcon

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Re: Stoichiometry question. Calculating Amount of Atoms.
« Reply #1 on: March 14, 2009, 06:16:14 PM »
Can you figure out the absolute chemical formula for styrene? For example, what is the molar mass of the empirical formula, CH?  How is it different from the actual molar mass?
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline ARGOS++

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Re: Stoichiometry question. Calculating Amount of Atoms.
« Reply #2 on: March 14, 2009, 06:17:47 PM »

Dear tinypleco;

Three question as a Hint for you:
      1.     How many H's in one molecule styrene?
      2.     How many molecules per mole?
      3.     How many moles styrene are 4.5 g?

Good Luck!
                    ARGOS++

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