1. A sample of oxygen has a volume of 2.1 L when the pressure is 375 torr, what is the volume when the pressure is 663 torr?

1.2 Liters

Explanation:

Given that,

Original volume of oxygen V1 = 2.1 L

Original pressure of oxygen P1 = 375 torr

New pressure of oxygen P2 = 663 torr

New volume of oxygen V2 = ?

Since pressure and volume are given while temperature is constant, apply the formula for Boyle's law

P1V1 = P2V2

375 torr x 2.1L = 663 torr x V2

787.5 torr L = 663 torr x V2

V2 = 787.5 torr L / 663 torr

V2 = 1.188L (Round the volume to the nearest tenth as in 1.2L)

Thus, the volume of oxygen is 1.2 liters when the pressure is 663 torr.

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.

answerlinnaeus;