Measuring volume of a gas

Sup /sci/

I have to do an experiment where I measure the volume of a gas. I could do all that eudiometer bullshit, but I'd rather use a manometer instead. If I know atmospheric pressure, temperature, and then the pressure after a reaction in a sealed Erlenmeyer flask attached to the manometer, how can I get the volume of the gas evolved during the process?

Sure, get a 1 cubic meter chamber, and pump the gas in.  I can tell you the volume.  Can you guess?

>in a sealed Erlenmeyer flask

fill the flask with water afterwards and measure the mass with a scale

alternatively, cocks.

What you could get, however, is the numer of moles of gas evolved, which would be of far greater interest.

>>1,4
I think both of you niggers need to quit abusing the word "evolved".

>>5
That's pretty standard usage, bub.