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Snezhnost [94]
2 years ago
15

Cambiar dos meses a segundos

Chemistry
1 answer:
aleksandr82 [10.1K]2 years ago
5 0

Answer:

5.256e+6

Explanation:

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Destruction of mountains can lead to what
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liquid magma

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Glycolic acid, which is a monoprotic acid and a constituent in sugar cane, has a pKa of 3.9. A 25.0 mL solution of glycolic acid
slava [35]

Answer:

pH of resulting solution = 7.98

Explanation:

The balanced equation  

HA + NaOH - Na+ + A- + H2O

Number of moles of A = Number of moles of HA  = Number of moles of NaOH

= 35.8/1000 * 0.020 = 0.000716 mol

Initial concentration of A = 0.000716/0.0608 = 0.01178 M

pKb = 14 – pKa = 14 -3.9 = 10.1

Kb = 10^{-Kb} = 10^{-10.1} = 7.943 * 10^-11

Kb = [HA][OH-]/[A-]

Kb = a^2/(0.01178 -a) = 7.943 * 10^-11

a^2 + 7.943 * 10^-11 a – 9.357 * 10^-13 = 0

a = 9.673 * 10^-7

OH- = a = 9.673 * 10^-7 M

pOH = -log [OH-] = -log (9.673 * 10^-7) = 6.02

pH = 14-6.02 = 7.98

8 0
2 years ago
Which type of chemical reaction occurs in Ca+CI2 CaCI2
dimaraw [331]
Ca + Cl2 = CaCl₂


A synthesis <span>reaction.</span>
3 0
3 years ago
What is the law of fossil succession?:
nata0808 [166]

Different Fossil organisms succeed one another to go up through the different rock layers in a definite and determinable order. Therefore, any time period can be recognized by its fossil content

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3 0
2 years ago
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