The table below lists the density of O₂ at various temperatures and at 1 atm. Graph the data and predict the substance’s normal boiling point.

Temperature (K)                       Density (mol/L)

60 ............................................                40.1

70 ............................................                38.6

80 ............................................                37.2

90 ............................................                35.6

100 ...........................................                0.123

120 ...........................................                0.102

140 ...........................................                0.087