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<em>I'm</em><em> </em><em>Abraar </em><em>Shaikh</em>
here is your explanation
Explanation:
People with high IQ might have bad grades. It is not necessary that high IQ requires higher grades. Mind of a person with high IQ works at a faster rate so they tend to ignore normal problems almost everywhere even in the examinations.
Answer: a. 
b. ![K_a=\frac{[HAsO_4^{2-}]\times [H_3O^+]}{[H_2AsO_4^{-}]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BHAsO_4%5E%7B2-%7D%5D%5Ctimes%20%5BH_3O%5E%2B%5D%7D%7B%5BH_2AsO_4%5E%7B-%7D%5D%7D)
Explanation:-
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
The balanced chemical equation is:
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms 
which is a conjugate base.
And, 
is gaining a proton, thus it is considered as a base and after gaining a proton, it forms 
which is a conjugate acid.
The dissociation constant is given by:
![K_a=\frac{[HAsO_4^{2-}]\times [H_3O^+]}{[H_2AsO_4^-]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BHAsO_4%5E%7B2-%7D%5D%5Ctimes%20%5BH_3O%5E%2B%5D%7D%7B%5BH_2AsO_4%5E-%5D%7D)
Answer:
The two structures that will provide positive identification of a plant cell under a microscope are I think C. cell wall and chloroplast.
Explanation:
Plant cells have some cell organelles which is unique to them, these organelles are not found in animal cells. Examples of such organelles are chloroplasts, large central vacuole, cell wall, etc.
b.
Same because, mass doesn’t count liquid or solid
M(N)=21.2 g
M(N)=14.007 g/mol
n(N)=m(N)/M(N)
n(N)=21.2g/(14.007g/mol)=1.51 mol
