An Open-End Mercury Manometer Was Constructed from a U-Shaped Tube

Multiple Choice

An open-end mercury manometer was constructed from a U-shaped tube and connected to a gas container. In a particular measurement, the level in the end of the tube connected to the gas container measured 82.8 cm above the U-neck, while the level in the open end (to the atmosphere) was 17.2 cm above the U-neck. The outside air pressure in the laboratory was measured as 764 torr. What is the pressure in the gas container?

A) 108 torr
B) 159 torr
C) 698 torr
D) 830 torr
E) 1420 torr