Discussion
One torr is
Answer: A
One torr is 1 mm of Hg.
The torr is defined as \(\frac{1}{760}\) of a standard atmosphere. Since one atmosphere supports 760 mm of mercury, one torr is the pressure of a 1 mm mercury column, about 133.3 Pa (the two differ only in the seventh significant figure).
76 cm (760 mm) of Hg is one whole atmosphere, not one torr. 1 cm, 76 mm and 100 mm of Hg are 10, 76 and 100 torr.
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