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3 years ago

5

How is John Cena invisible?

2 answers:

bezimeni [28]3 years ago

8 0

Primare Joke Is The You can't see me

barxatty [35]3 years ago

7 0

Cause you can’t see him if you’re knocked out :)

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When a mixture of oxygen and hydrogen is ignited in a test tube, the

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Which change in the h+ ion concentration of an aqueous solution represents a decrease of one unit on the ph scale?

melisa1 [442]

The answer would be a tenfold increase<span>
The pH scale is calculated based on the concentration of H+ ion in the solution. The formula is using log10, so to decrease 1 unit from the scale it will be 10^1= 10 fold of increase. For 2 </span>unit, you will need 10^2= 100 fold of increase.

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3 years ago

What is the pH of a 0.222 M acetic acid solution?

Oksi-84 [34.3K]

pH=2.7

<h3>Further explanation</h3>

Acetic acid = weak acid

$\tt [H^+]=\sqrt{Ka.M}$

Ka = acid ionization constant

M = molarity

Ka for Acetic acid(CH₃COOH) : 1.8 x 10⁻⁵

$\tt [H^+]=\sqrt{1.8\times 10^{-5}\times 0.222}\\\\=0.001998=1.998\times 10^{-3}$

$\tt pH=3-log~1.998=2.7$

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3 years ago

Calculate the PH if the Poh is 8.00

Neporo4naja [7]

PH + pOH = 14
pH + 8 = 14
pH= 6

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3 years ago