What does 1 atm of pressure equal in torr?

One atmosphere of pressure is defined as being equivalent to 760 torr. This relationship comes from the history of pressure measurement and has become a standard conversion factor used in various scientific calculations.

The torr is a unit of pressure that is based on an absolute scale, which is derived from the height of a column of mercury in a barometer. One torr is approximately equal to the pressure exerted by a column of mercury that is 1 millimeter high at standard gravity. Therefore, since normal atmospheric pressure can support a column of mercury approximately 760 millimeters high, it follows that 1 atm equals 760 torr.

Understanding this relationship is essential when converting between different units of pressure, as it is often necessary in various physics and chemistry applications. The incorrect choices do not reflect the established relationship between atmospheres and torr.