Correct option (c) 0.728 bar
Explanation:
Vapour pressure of heptane = 105.2 kPa
Vapour pressure of octane = 46.8 kPa
Mass of heptane = 25.0 g
Molar mass of heptane = 100 g/mol
Mass of octane = 35.0 g
Molar mass of octane = 114 g/mol
So, amount of heptane,