The vapor pressure of pure benzene at a certain temperature is `640 mmHg`. A nonvolatile
Channel: Doubtnut
Date: 23/08/2020

The vapor pressure of pure benzene at a certain temperature is `640 mmHg`. A nonvolatile nonelectrolyte solid weighing `2.0 g` is added to `39 g` of benzene. The vapor pressure of the solution is `600 mmHg`. What is the molecular mass of the solid substance. Strategy: Use Equation `(2.58)` as the concept of colligative properties is based on dilute solution. The moleculsr mass of benzene is `78u`.