If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for fluorine be? nitrogen trifluoride → nitrogen + fluorine a) 3f2 b) 6f2 c) f3 d) 6f

The given word equation is:

Nitrogen trifluoride-->Nitrogen + Fluorine

The chemical formula of nitrogen trifluoride is and that of nitrogen gas is and fluorine gas is .

The balanced chemical equation representing the decomposition reaction of nitrogen trifluoride to nitrogen and fluorine will be,

The chemical formula of fluorine gas will be as fluorine exists as a diatomic gas in it's pure state. The coefficient of fluorine will be 3

Therefore, the correct answer is a) 3F2

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

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.