Answer:

Explanation:
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In this case, since the modelling of titration problems can be approached via the Henderson-Hasselbach equation to set up a relationship between pH, pKa and the concentration of the acid and its conjugate base, we can write:
![pH=pKa+log(\frac{[NO_2^-]}{[HNO_2]} )](https://tex.z-dn.net/?f=pH%3DpKa%2Blog%28%5Cfrac%7B%5BNO_2%5E-%5D%7D%7B%5BHNO_2%5D%7D%20%29)
Whereas the pH is given as 3.14 and the concentrations are the same, that is why the pH would be equal to the pKa as the logarithm gets 0 (log(1)=0); thus, we can calculate the Ka via:

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Answer:
The answer is no.
Explanation:
The surface of earth does not always stay the same as we know earth constantly moves and the surface of earth is constantly remodeled by various geological processes.
Answer:
false
Explanation:
the answer is false because there is minerals in our water, ect.
Answer:
Calculate the energy of a photon having a wavelength of 7.71 x 10^-5 m.
Explanation:
The gravitational pull of the moon is not strong enough to attract a significant atmosphere.