At 0.750 atm, the volume of a gas is 300.0 ml. if the temperature remains constant and the pressure is changed to 0.600 atm, what is the new volume of the gas? 0.00150 ml 0.00200 ml 155 ml 375 ml

375

Explanation: just took the test

- 375 mL, last choice is correct.

Solution:- The problem is based on Boyle's law. From this law, At constant temperature the volume of the gas is inversely proportional to the pressure.

The equation used for this gas law is:

is initial pressure, is final pressure.

is initial volume and is final volume.

From given data, the initial pressure is 0.750 atm, initial volume is 300.0 mL.

Final pressure is 0.600 atm and we are asked to calculate the final volume.

Let's plug in the values in the equation:

Let's rearrange this for final volume.

= 375 mL

So, the new volume of the gas is 375 mL, last choice is correct.

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

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.