What is the density of O2 at STP?
- NorrieLv 71 decade agoFavorite Answer
1 mole. of O2 = 32g.
1 mole. at STP occupies 22.4L.
Density = Mass / Volume.
Density of O2 at STP = 32g / 22.4L = 1.43g/L = 1.43kg/m³
- pisgahchemistLv 71 decade ago
D = m/V -- equation for density
PV = nRT -- ideal gas equation
PV = mRT / M -- where m=mass, M=molar mass
P = mRT / VM -- put V on right hand side, under m
P = DRT / M -- m over V equals density
D = PM / RT -- solve for density, then plug in the numbers
D = 1.00 atm x 32g/mol / (0.0821 Latm/molK) / 298K
D = 1.31 g / L (at STP)