3 years ago

Write the following isotope in nuclide notation: oxygen-14

Chemistry

1 answer:

In-s [12.5K]3 years ago

8 0

Answer:

$14\\8$ O

Explanation:

The top number always represents the mass number.

The bottom number always represents the atomic number.

The element always goes after the numbers.

If charge is present, that comes after the element.

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2 years ago

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Calculate the ph of a buffer that is 0.225 m hc2h3o2 and 0.162 m kc2h3o2. the ka for hc2h3o2 is 1.8 Ã 10-5. 4.60 9.26 4.74 4.89

Stella [2.4K]

Answer:

The pH of the buffer solution is 4.60.

Explanation:

Concentration of acid = $[HC_2H_3O_2]=0.225 M$

Concentration of salt = $[KC_2H_3O_2]=0.162 M$

Dissociation constant = $K_a=1.8 \times 10^{-5}$

The pH of the buffer can be determined by Henderson-Hasselbalch equation:

$pH=pK_a+\log\frac{[salt]}{[acid]}$

$pH=-\log[1.8 \times 10^{-5}]+\log\frac{0.162 M}{0.225 M}$

pH = 4.60

The pH of the buffer solution is 4.60.

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2 years ago

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