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sleet_krkn [62]
2 years ago
12

Carbon-14 has a half-life of 5,730 years. It is used in "carbon dating" to determine the age of once living organisms. How much

of a 144 gram sample of C-14 will remain after 17,190 years have past.
Chemistry
1 answer:
Nookie1986 [14]2 years ago
7 0

Answer:

18 grams

Explanation:

Because 17,190 yrs divided by the amount of years it takes for a half-life to occur is 3. So 3 half life’s happen, so you divide 144/2 once, equaling 72. You divide 72/2 again (another half-life) and you get 36. You then calculate the third half life by dividing 36/2 which equals 18 grams.

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pH of the buffer solution is 1.76.

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The solution of formic acid and formate ions is a buffer.

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[HCOOH] = 1.435 M; equilibrium concentration of formic acid

pKa = -logKa

pKa = -log 1.8×10⁻⁴ M

pKa = 3.74

Henderson–Hasselbalch equation: pH = pKa + log(cs/ck)

pH = 3.74 + log (0.015 M/1.435 M)

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More about buffer: brainly.com/question/4177791

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Stolb23 [73]

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