Quote:
Originally Posted by mineistaken
That number is also metric system number, maybe you heard it- millimeters  |
mmhg- a simple explanation is in order:
The torr (symbol: Torr) or millimeter of mercury (mmHg) is a non-SI unit of pressure. It is the atmospheric pressure that supports a column of mercury 1 millimeter high.
If your assignment is using mm to represent the height of mercury columns then 1 mm = 1 Torr.
Is it possible that there is another meaning assigned to the mm units in the question?
Is any other info given which might explain such a different interpretation?
From your further info it looks like you have to calculate the difference in pressure represented by each column of mercury from the given atmospheric pressure of 640Torr or 640 mmHg.
Try adding each value in mm to the atmospheric pressure (640 mmHg) to find the total pressure of each gas as each will have to exert a pressure of atmospheric + to produce a reading on the manometer.