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### Topic: stochiometric/Ideal gas law question  (Read 271 times)

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#### Ben

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##### stochiometric/Ideal gas law question
« on: November 27, 2019, 07:30:55 PM »
Hello,
My first post here. Had a question regarding a stochiometric/ideal gas law problem. I attached a photo of the processes I went through to complete the problem, and was wondering if anyone would be able to see if I did the problem correctly.
I have another question about a similar problem, but for now I will start with this one question.
Thank you,
Ben

#### chenbeier

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##### Re: stochiometric/Ideal gas law question
« Reply #1 on: November 28, 2019, 01:49:07 AM »
No,  Check how many liter Oxygen correspond to the given hydrogen.
Convert this to mole and then use molar mass to get the mass.

#### Borek

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##### Re: stochiometric/Ideal gas law question
« Reply #2 on: November 28, 2019, 03:41:57 AM »
You are given volume of the gas, not number of moles, so you can't plug that number into $V=\frac{nRT}{P}$ (besides, this is formula for finding volume, so the answer can't be in grams).

You are right in starting with the ideal gas law, you just need to solve it for n and plug the given volume in. Once you know number of moles of hydrogen, just follow the stoichiometry.
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