3 years ago

How has scientists' understanding of the atoms changed over time?

Chemistry

1 answer:

Viefleur [7K]3 years ago

8 0

They discovered more and more objects with different numbers of atoms. which gave them a better understanding

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Suppose you want to prepare a buffer with a pH of 4.59 using formic acid. What ratio of [sodium formate]/[formic acid) do you ne

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7.08

Explanation:

To solve this problem we'll use the Henderson-Hasselbach equation:

pH = pka + log $\frac{[A^-]}{[HA]}$

Where $\frac{[A^-]}{[HA]}$ is the ratio of [sodium formate]/[formic acid] and pka is equal to -log(Ka), meaning that:

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4.59 = 3.74 + log $\frac{[A^-]}{[HA]}$

And solve for $\frac{[A^-]}{[HA]}$ :

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$10^{(0.85)}$ = $\frac{[A^-]}{[HA]}$

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Why are valence electrons important?

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They are the outer layer of the electron layers.

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The term organic chemistry originally meant the chemistry of compounds obtainable from plants and animals

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