ABOUT MOLECULAR WEIGHTS AND REACTIONS: Determine the molecular weights: i) Ethyl alcohol, CH3OH: _____ ii) Methane, CH4: _____ iii) Oxygen, O2: _____ iv) n-Octane, C8H18: _____ v) Helium, He: _____ a) If identical masses of each of the substances are at the same fixed temperature and fixed pressure, which is least likely to be liquid? _______ b) If identical masses of each of the substances are at the same fixed temperature and fixed pressure, which is most likely to be liquid? _______ c) Does it matter what masses were involved? ______ d) Ethyl alcohol and oxygen have near equal molecular weights. Which is more likely to be liquid. ______. |