The mass of a non – volatile solute (molecular mass = 40) which should be dissolved in 114 g octane to reduce its vapour pressure to 80 % will be
A. 20 g
B. 30 g
C. 10 g
D. 40 g
Answer:C
The mass of a non – volatile solute (molecular mass = 40) which should be dissolved in 114 g octane to reduce its vapour pressure to 80 % will be
A. 20 g B. 30 g C. 10 g D. 40 g