How does extreme pressure affect the volume occupied by a real gas compared to the predictions of the ideal gas law? A. The true volume of the gas will be higher than predicted by the ideal gas law because the volume of the actual particles is more significant under high pressure.

B. The true volume of the gas will be higher than predicted by the ideal gas law because the attraction between the particles is weaker under high pressure.

C. The true volume of the gas will be lower than predicted by the ideal gas law because the volume of the actual particles is more significant under high pressure.

D. The true volume of the gas will be lower than predicted by the ideal gas law because the attraction between the particles is weaker under high pressure.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.