$3\mathrm{.}3$

A manometer which uses Benzene $)=(0\mathrm{.}88$ as indicator fluid, measures a vacuum of $500mm$ when connected to a gas reactor. The side of the manometer that is not connected to the reactor is open to the atmosphere.

a$)$ Draw a sketch of the manometer clearly showing where it is connected to the reactor as well as the liquid levels.

b$)$ What is the pressure in the reactor in $Pa(\frac{?}{abs})$ if the barometric pressure is $660mmHg?$