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Topic: Hydrogen atoms in a problem  (Read 3383 times)

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skitty

  • Guest
Hydrogen atoms in a problem
« on: September 25, 2004, 04:32:16 PM »
How many hydrogen atoms are contained in 175 grams of C3 H8?
Here's what I multiplied together: 175 g C3H8 x 1 mol H8 X 6.022 x 10^23 X 8 H Atoms.
Here's what I divided by 32.08 g C3 H8.  Plus the usual cancelling units.
I ALMOST have the right answer.  Please help. Or if you know a better way, anything would be great.

Demotivator

  • Guest
Re:Hydrogen atoms in a problem
« Reply #1 on: September 25, 2004, 05:17:51 PM »
32.08 g C3 H8 is wrong is the wrong molecular weight.
It's 44.096 g.

skitty

  • Guest
Re:Hydrogen atoms in a problem
« Reply #2 on: September 25, 2004, 08:05:01 PM »
D'OH!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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