In the balanced chemical reaction shown below, what is the molar ratio of O2 to H2O C3H8(g) + 5O2(g)—> 3CO2(g) + 4H2O(g)

A. 4:3
B. 3:1
C. 5:4
D: 5:3

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.