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Elanso [62]
3 years ago
15

Which of these are isotopes of each other? Boron-12, Carbon-12, Carbon-13, Nitrogen-13

Chemistry
1 answer:
Anika [276]3 years ago
5 0
Carbon 13 I believe.
Never heard of an isotope for boron or nitrogen and I know Carbon 12 is the original form of carbon so.. Yeah
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A fossil was analyzed and determined to have a carbon-14 level that is 70 % that of living organisms. The half-life of C-14 is 5
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t_{\frac{1}{2}}=\frac{0.693}{k}

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Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 1.21\times 10^{-4}years^{-1}

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a = let initial amount of the reactant  = 100

a - x = amount left after decay process = \frac{70}{100}\times 100=70

t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{70}

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3 years ago
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B

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