Chemistry
posted by Anonymous .
how do I find the density of CO2, I am not allowed to look it up and all I have is H202 and ethanol. I don't think I have to use both, but I can't figure out how to calculate it.

It's really very easy to do.
You know 1 mole of a gas occupies 22.4 L @ STP.
You know 1 mole has a mass (for CO2) of 44 (32 for Oxygen and 12 for C = 44).
Since mass= volume x density, then
density = mass/volume = 44/22.4 = ?? 
i can't use any formulas to find the volume of the gas. Through an experiment I calculated the mass, but know I am having trouble with the volume.

Actually, using 22.4 L/mole is not a formula for the volume but an experimentally determined number. If this is not satisfactory, I suggest you type in your WHOLE problem instead of getting it to us by bits and pieces. It's tough to answer a problem when we don't know the limitations and/or directions. And there is NO indication at all about how you are to use H2O2 and EtOH.