Copyright (c) 1996 by MA Lloyd <malloy00@io.com>

Material             Density  Mol Wt.
Hydrogen (H2)         0.070    2.016
Helium (He)           0.125    4.003
Methane (CH4)         0.424   16.043
Ammonia (NH3)         0.682   17.030
Water (H2O)           1.000   18.015
Neon (Ne)             1.200   20.170
Carbon Monoxide (CO)  0.793   28.011
Nitrogen (N2)         0.804   28.012
Oxygen (O2)           1.142   32.000
Hydrazine (N2H4)      1.004   32.044
Argon (Ar)            1.390   39.948
Carbon Dioxide (C02)  1.101   44.010
Xenon (Xe)            3.100  131.300
Mercury (Hg)         13.595  200.590