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another chem question any explanations and answers would be great.. question below:?
Manometers can use liquids other than mercury to measure small pressure differences. On a day when the barometric pressure is 763.0 torr, a water manometer is connected between the atmosphere and a glass bulb containing a sample of helium gas has a height difference of 30.2 cm, The water level is higher in the arm connected to the bulb. Calculate the pressure in the bulb (in torr).
thanx for any responses guys..
1 Answer
- zee_primeLv 61 decade agoFavorite 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.