Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

1. A Review of General Chemistry

Intro to Organic Chemistry

Organic Chemistry

1. A Review of General Chemistry

Intro to Organic Chemistry

Previous problemNext problem

Struggling with Organic Chemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

What information can absolute dating provide a scientist about the age of a fossil in the fossil record?

The relative age of the fossil compared to other fossils.

The exact age of the fossil in years.

The environmental conditions when the fossil was formed.

The type of organism the fossil represents.

Previous problemNext problem

Verified step by step guidance

Absolute dating is a method used to determine the exact age of a fossil in years, rather than just its relative age compared to other fossils.

This technique often involves measuring the decay of radioactive isotopes within the fossil or the surrounding rocks. Common isotopes used include Carbon-14, Uranium-238, and Potassium-40.

The decay rate of these isotopes is known and can be used to calculate the time elapsed since the fossil was formed. This is based on the concept of half-life, which is the time required for half of the radioactive isotope to decay.

By measuring the ratio of parent isotopes to daughter isotopes in a sample, scientists can determine the number of half-lives that have passed, and thus calculate the age of the fossil.

Absolute dating provides precise age estimates, which are crucial for understanding the timeline of life on Earth and the environmental conditions at the time the fossil was formed.