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Topic: finding molar concentration of gas  (Read 5979 times)

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Offline Armani

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finding molar concentration of gas
« on: January 07, 2010, 03:04:09 PM »
1% HF in nitrogen. how would I find the moles of F in this?

Thank you

Offline Borek

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Re: finding molar concentration of gas
« Reply #1 on: January 07, 2010, 05:08:09 PM »
Please don't cross post.

What do you mean "moles"? Number of moles? That's amount, 1% is concentration, not knowing volume/mass of gas/liquid/whatever you can't calculate number of moles from a given concentration.
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Offline Armani

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Re: finding molar concentration of gas
« Reply #2 on: January 11, 2010, 10:17:10 AM »
Please don't cross post.

What do you mean "moles"? Number of moles? That's amount, 1% is concentration, not knowing volume/mass of gas/liquid/whatever you can't calculate number of moles from a given concentration.

Sorry for cross posting.

Since I know that .5%F or .5g F, can I use this information to find moles of F (.5g/19g F) and then multiply by 22.4L (ideal gas) to find the volume I need for .5% F? (m02632 mol F * 22.4L)
Then use C1V1=C2V2 to find the volume of 1% HF in nitrogen needed? (.5%F)(.58992L)=(1% HF)(x L of HF)

Would this work?

Offline sjb

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Re: finding molar concentration of gas
« Reply #3 on: January 11, 2010, 01:15:17 PM »
I'm not sure how you've got 0.5% F, but assuming that's right, then the method seems fine.

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