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AleksAgata [21]
4 years ago
6

When the shift occurs in the earth's crust , what does the energy radiates us out as ?

Chemistry
1 answer:
Stels [109]4 years ago
8 0
When a sudden break or shift occurs the energy radiates it comes out of the water
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A 0.020 M solution of niacin has a pH of 3.26. (a) What percentage of the acid is ionized in this solution
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Answer: 2.75%

Explanation:

pH=-log [H+]

3.26 = -log [H+]

[H+] = 5.495\times 10^{-4} M

HA\rightleftharpoons H^++A^-

initial      0.020     0           0

eqm        0.020 -x    x      x

K_a=\frac{[H+][A-]}{[HA]}

K_a=\frac{[x][x]}{[0.020-x]}

x=5.495\times 10^{-4}

K_a=\frac{[5.495\times 10^{-4}]^2}{[0.020-5.495\times 10^{-4}]}

K_a =1.553\times 10^{-5}

percent dissociation = \frac{[H^+_eqm]}{[Acid_{initial}]}\times 100

percent dissociation=\frac{5.495\times 10^{-4}}{0.020}\times 100

Thus percent dissociation= 2.75 %

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