Need help with a chemistry problem

[Automaggin2]

What is the volume of a sample of gas at STP with a mass of 83g and molar mass at 21g/mol


and....



A sample of gas is collected over water at 17*c and 810mm Hg fills he euidometer tube to 41mL. what is the volume of gas at STP (vapor pressure of h20 at 17*c is 14.5)



converstions must be in atm, torrs, kPa, mmHg and so fourth

[i like tictacs]

83g x 21g/1mol x 1mol/22.4L = 77.8 L

i did the first one for ya

[m-98]

For the first one I got 80.83 cubic decimeters, did I do something wrong?

I have no idea how to do the second one, sorry.

[i like tictacs]

Originally posted by m-98
For the first one I got 80.83 cubic decimeters, did I do something wrong?

I have no idea how to do the second one, sorry.

STP is 22.4 L per mol.

vol= liters, when dealing with gas.

[Automaggin2]

Wow your smart

[BobTheCow]

lol that's funny, I *should* be doing homework exactly like that right now, in order to prevent myself from failing the final next week!! *chuckles to self* riiiiight...

[ZAust]

well i knew how to do the first one till a week ago, when i promptly forgot eveything i learned in chemistry. ah, i love summer.

[m-98]

Originally posted by i like tictacs



STP is 22.4 L per mol.

vol= liters, when dealing with gas.

I know that, let me check my math, I used 23 instead of 21, I fixed that and I got 88.53.

[i like tictacs]

close enough, lol

[m-98]

Since I can't seem to get the answer right I'll say one thing, do you own homework!