Description
The barometric pressure is 760.8 torr, a water manometer, connected between the atmosphere and a bulb containing helium has a height difference of 19.1 cm (water level is higher near the bulb) Calculate pressure in the bulb in torr.
Explanation & Answer
This is physics, not chemistry. You don't need to know the chemical composition of the gas in the bulb, except that it's insoluble. Mercury has a density of 13.6 so the pressure in the bulb must be 763.0-(13.6x30.2/1000)=763.0-0.41=762.59 torr.
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