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Elis [28]
3 years ago
15

Can some body plz help correct me or correct the true or false answers I did wrong. I’m not sure there right :(

Chemistry
1 answer:
3241004551 [841]3 years ago
8 0

4 3 and 5 are wrong:)

4 is true and 5 is false

4. insulators are really thick materials that keep electrons within their space.

For example, a charger the rubber is the insulators and the electrons are flowing inside of the charger so you don't get shocked.

5. without the force of attraction, there are no atoms:)

for number 3, its a trick question

Hope this helped!

(learned these this year so I didn't forget them:)

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Problem PageQuestion A student prepares a aqueous solution of butanoic acid . Calculate the fraction of butanoic acid that is in
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Answer:

Incomplete question: A student prepares a 0.54 mM aqueous solution of butanoic acid...

The answer is: The percentage of dissociation is 15.4%

Explanation:

Given:

Ka = 1.51x10⁻⁵

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The reaction is:

                   C₄H₈O₂               =             C₄H₇O₂⁻          +           H⁺

I                    0.54x10⁻³                             0                                0

E                   0.54x10⁻³(1-x)                      0.54x10⁻³x                0.54x10⁻³x

Where x is the degree of dissociation

Ka=\frac{[H^{+}][C_{4}H_{7}O_{2}^{-}     }{[C_{4}H_{8}O_{2}   } \\1.51x10^{-5} =\frac{0.54x10^{-3}x^{2}  }{1-x} \\x^{2} +0.028x-0.028=0\\x_{1} =0.154\\x_{2} =-0.182

We will choose the positive value

x = 0.154

The percentage of dissociation is 15.4%

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