# Question: How to find out how much carbon 14 remains?

Contents

## How do you calculate carbon 14?

m(t)=100e−0.000121t. With this formula, we can calculate the amount m of carbon-14 over the years. Every year, the mass m of carbon-14 is multiplied by e−0.000121≈0.999879. After 100 years, 98.7973 nanograms still remain.

## How do you find the decay constant of carbon 14?

Now the decay constant for Carbon-14 is l = 3.8394 × 10-12 per second. This corresponds to a half life of 5,730 years. R0 is simply (3.8394×10-12)(6.5221×1010) = 0.2504 decays per second. The measured rate is R(t) = 11.9 decays per minute = 0.1983 decays per second.

## How much carbon 14 would remain in a fossil after 11400 years?

That is, 16 g of 14C would remain after 5700 years and 8 g would remain after 11,400 years.

## What happens to carbon-14 but not carbon-12 in a living organism after it has died?

When an organism dies, it ceases to absorb Carbon 14 from the atmosphere and the Carbon 14 within the organism decays exponentially, becoming Nitrogen 14, with a half-life of approximately 5730 years. Carbon 12, however, is stable and so does not decay over time.

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