1. Ca(HCO3)2
2.Ca(HCOO)2
3. Ca(OH)2
4.NaOH
5.KCI
6.MgSO4
7.PbO
8.HCl
9.HNO3
10.H2SO4
11.NH3
12.(NH4)3PO4
13.NaOH
:)
An element is a pure substance that cannot be separated or divided into simpler substances by any method (physical or chemical). The four common elements in all the living organisms are carbon, oxygen, hydrogen, nitrogen.
Thus, the four elements that make up about 96 % of body matter are carbon, oxygen, hydrogen, nitrogen (c).
Those substances which has pH less than 5 are more acidic than Honeybee Venom. Some of them are listed below along with their pH scale,
1) <span>Acid rain and Tomato Juice has a pH of 4.
2) Soda and Orange Juice has a pH of 3.
3) Vinegar and Lemon Juice has pH of 2.
4) Gastric acid has a pH of 1.
5) Battery Acids have pH of zero.</span>
Answer:
12. is the pressure equilibrium constant for the decomposition of ammonia at the final temperature of the mixture.
Explanation:
![2NH_3(g)\rightleftharpoons N_2(g)+3H_2(g)](https://tex.z-dn.net/?f=2NH_3%28g%29%5Crightleftharpoons%20N_2%28g%29%2B3H_2%28g%29)
initially
3.0 atm 0 0
At equilibrium
(3.0-2p) p 3p
Equilibrium partial pressure of nitrogen gas = p = 0.90 atm
The expression of a pressure equilibrium constant will be given by :
![K_p=\frac{p_{N_2}\times (p_{H_2})^3}{(p_{NH_3})^2}](https://tex.z-dn.net/?f=K_p%3D%5Cfrac%7Bp_%7BN_2%7D%5Ctimes%20%28p_%7BH_2%7D%29%5E3%7D%7B%28p_%7BNH_3%7D%29%5E2%7D)
![K_p=\frac{p\times (3p)^3}{(3.0-2p)^2}](https://tex.z-dn.net/?f=K_p%3D%5Cfrac%7Bp%5Ctimes%20%283p%29%5E3%7D%7B%283.0-2p%29%5E2%7D)
![=\frac{0.90 atm\times (3\times 0.90 atm)^3}{(3.0-2\times 0.90 atm)^2}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B0.90%20atm%5Ctimes%20%283%5Ctimes%200.90%20atm%29%5E3%7D%7B%283.0-2%5Ctimes%200.90%20atm%29%5E2%7D)
![K_p=12.30\approx 12.](https://tex.z-dn.net/?f=K_p%3D12.30%5Capprox%2012.)
12. is the pressure equilibrium constant for the decomposition of ammonia at the final temperature of the mixture.