[Ben]

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]

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]

You are given volume of the gas, not number of moles, so you can't plug that number into [itex]V=\frac{nRT}{P}[/itex] (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.