A mercury manometer measures a pressure of 200.0 mmHg.What is this pressure in Pa?
A) 19,770
B) 26,660
C) 30,230
D) 36,760
E) 39,600

Question

Quizplus · Accepted Answer

We can use the formula:

P = ρgh

where P is pressure, ρ is the density of mercury (13,595 kg/m³), g is the acceleration due to gravity (9.81 m/s²), and h is the height of the mercury column in meters.

To convert 200.0 mmHg to meters:

200.0 mmHg = 0.2000 m

Then we can solve for P:

P = (13,595 kg/m³)(9.81 m/s²)(0.2000 m) = 26,660 Pa

Therefore, the answer is B.

A Mercury Manometer Measures a Pressure of 200