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Topic: finding how many molecules of hydrogen were used?  (Read 4015 times)

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Offline monique2302

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finding how many molecules of hydrogen were used?
« on: January 16, 2011, 03:12:58 PM »
Ammonia is produced from its elements in a formation reaction. If 1.50 x 10^25 molecules of ammonia are produced, how many molecules of hydrogen were used?

So do I have to find how many moles there are first to find how many molecules their are?

Offline rabolisk

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Re: finding how many molecules of hydrogen were used?
« Reply #1 on: January 16, 2011, 03:25:58 PM »
Try to attempt the question first, and I can help you along the way.

Offline AMEDIO

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Re: finding how many molecules of hydrogen were used?
« Reply #2 on: January 17, 2011, 04:53:04 AM »
yup :)

Offline sci994

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Re: finding how many molecules of hydrogen were used?
« Reply #3 on: January 17, 2011, 06:19:05 AM »
You know the reaction?
It's 3H2+N2 :rarrow:2NH3.

You calculate the mols of ammonia, then you calculate number of mols of hydrogen and ten you calculate the number of molecules.

N(number of molecules)=NA*n

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