Write a balanced equation for the decomposition of naalh4.

2 NaAlH₄ (s)  →  2 NaH (s) + 2 Al (s) + 3 H₂(g)

Explanation:

Decomposition reaction -

It is the type of reaction , where one only one reactant and more than one products ,

As, the reactant breaks down into two or more than products , the reaction me use some sort of catalyst or with the aid of heat and light to proceed , is known as a decomposition reaction .

The decomposition of NaAlH₄ , can be done in the following manner -

generating , NaH and Al  as the solid product and H₂ as the gaseous product,

NaAlH₄ (s)  →  NaH (s) +  Al (s) +  H₂(g)

The reaction can be balanced , simply by equalizing in the number of atoms in the reactant with the number of atoms in the product side , by multiplying the molecule with whole numbers .

Hence , the balanced reaction is given as -

2 NaAlH₄ (s)  →  2 NaH (s) + 2 Al (s) + 3 H₂(g)

explanation:

detials on each model with digrams

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.