Final answer:
The lowest gas pressure among the provided options is 95,000 Pa, which is equivalent to 712.5 Torr, lower than both 840 Torr and 1.2 atm (912 Torr).
Step-by-step explanation:
The student asked which pressure measurement describes the lowest gas pressure among the given options. To determine which value is lowest, we need to convert all pressures to the same unit for comparison. The units for pressure provided are Torr, atm, and Pa. Atmospheric pressure at sea level is taken as standard measurement which is 1 atm, 760 Torr, or 101,325 Pa.
- Option a: 840 Torr is above standard atmospheric pressure.
- Option b: 1.2 atm, which is also above atmospheric pressure as it equals 912 Torr.
- Option c: 95,000 Pa, which can be converted to Torr using the conversion 1 Pa = 0.0075 Torr, giving us 95,000 * 0.0075 = 712.5 Torr.
Thus, option c, 95,000 Pa is the lowest pressure, as 712.5 Torr is less than 840 Torr or the 912 Torr equivalent of 1.2 atm.