Label each research topic below as an example of pure chemistry or applied chemistry. 1) developing a fire resistant fabric 2) reducing the active ingredient in a medication to minimize side effects 3) analyzing the compounds found in a soil sample from mars 4) measuring how much water expands upon freezing

These can be classified as

1) developing a fire resistant fabric  : it will involve the application of chemistry as this is not direct chemistry so this will be applied chemistry

2) reducing the active ingredient in a medication to minimize side effects :

This will involve the pure chemistry

3) analyzing the compounds found in a soil sample from mars  

This will involve again the analysis part hence it is pure chemistry

4) measuring how much water expands upon freezing

This is application of chemistry , hence applied chemistry

Pure chemistry:

Applied chemistry:

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.