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Anon25 [30]
3 years ago
12

Write the number 345 in scientific notation, with the same number of significant figures:

Chemistry
1 answer:
uranmaximum [27]3 years ago
8 0

Answer:

3.45 x 10^2

Explanation:

345= 3 SF

3.45 x 10^2= 3 SF

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Answer:

Ka = 6.02x10⁻⁶

Explanation:

The equilibrium that takes place is:

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We <u>calculate [H⁺] from the pH</u>:

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  • [H⁺] = 10^{-pH}
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Keep in mind that [H⁺]=[A⁻].

As for [HA], we know the acid is 0.66% dissociated, in other words:

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We <u>calculate [HA]</u>:

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Finally we <u>calculate the Ka</u>:

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