The amount of carbon-14 ($^{14}_6 C$) in a wooden artifact is measured to be.6.25 percent the amount in a fresh sample of wood from the same region. The half-life of carbon-14 is 5715 years. Assuming the same amount of carbon-14 was initially present in the artifact, determine the age of the artifact.

The radioactive isotope carbon- 14 is present in small quantities in all life forms, and it is constantly replenished until the organism dies, after which it decays to stable carbon- 12 at a rate proportional to the amount of carbon-14 present, with a half-life of 5730 years. Suppose C(t) is the amount of carbon-14 present at time t. Find the value of the constant k in the differential equation $C^{\prime}=-k C$.

What is the hybridization of each of the carbon atoms in allene?

the enzyme that catalyzes the fixation of carbon dioxide in photosynthesis is _____.

Why is it not possible for a compound to have a quintary carbon?

Draw a diagram to show the bonding in carbon dioxide.

Does carbon monoxide float or sink in the air?

Give the names and formulas of two oxides of carbon.

What are some possible applications of carbon nanotubes?

What hybrid orbital set is used by each of the indicated atoms in the molecules below? (a) the carbon atoms and the oxygen atom in dimethyl ether, $\mathrm{CH}_3 \mathrm{OCH}_3$ (b) each carbon atom in propene (c ) the two carbon atoms and the nitrogen atom in the amino acid glycine

Use an Euler diagram to determine whether the syllogism is valid or is a fallacy. All living things contain carbon. Roger contains carbon. Therefore, Roger is a living thing.

Indicate the shortest carbon-oxygen bond in the molecule.

The proportion of carbon-14 still present in a sample after t years is $e^{-0.00012 t}$. Estimate the age of the cave paintings discovered in the Ardéche region of France if the carbon with which they were drawn contains only 2.3% of its original carbon-14. They are the oldest known paintings in the world.

The isotopes of carbon have from 2 to 16 neutrons. Use this information to make a table that shows the 15 isotopes of carbon and the atomic number and mass number of each.