[Mahonroy]

Hello, worked most of this problem, but I'm completely stuck on the last part, and don't know what to do, can anyone help me? Thanks for your time!
p.s. I'm having trouble with III too if anyone feels like aiding me there as well

[Borek]

PV=nRT

[Mahonroy]

lol I know the equation, I am just confused how to use it here...

[Borek]

Calculate a volume of nitrogen first. Then use the information that this is just 0.72 fraction of total volume of air needed.

[Mahonroy]

so I use 99333 pa, 295.15 K, r is 8.314, what is n or v and which one do i solve for?

[Borek]

You wrote you know the equation, now you write you have no idea what symbols mean?

I know how to drive, I just don't know what the driving wheel is for.

http://en.wikipedia.org/wiki/Ideal_gas_equation

[Mahonroy]

Thats not the case at all actually. And i've already gone through that... it doesn't make sense... if it made sense I wouldn't be posting on a forum.
I just gave the numbers for the symbols that I thought I needed, instead of saying that that is correct or wrong, you just want to basically tell me to go somewhere else to get help?

[Mahonroy]

Ok so I used 28.0134 for n, and solved for V to get 0.69203, is that right?

[Borek]

No idea what is 28 and where you got it from.

For c you have to use the ideal gas equation twice - first, to calculate amount of ammonia, then, to calculate volume of nitrogen.


Edit: OK, 28 is molar mass of N₂. But it is of no use at this stage. Besides, if you used 28, that means 1 mole of gas. 1 mole of gas around STO or RTP is over 20 liters, not below 1.

[Mahonroy]

Ok so what do I use then? I posted about the n and v values, and at this point I'm just randomly guessing, as you can see with my n2 value...