What is One Atmosphere of Pressure

Question

What is one atmosphere of pressure?
A) 760 mm Hg
B) 1000 mm Hg
C) 105 mm Hg
D) 45 mm Hg
E) 650 mm Hg

Accepted Answer

One atmosphere of pressure is defined as the pressure exerted by the weight of the Earth's atmosphere at sea level. This pressure is equivalent to 760 mm Hg, also known as 760 torr, or 101.325 kPa. Therefore, Choice A (760 mm Hg) is the correct answer.