what are carbon chains that are between twelve and twenty carbon atoms long?

To find the carbon chains that are between twelve and twenty carbon atoms long, you can follow these steps:

1. Start by understanding the concept of a carbon chain. Carbon chains are simply a series of carbon atoms linked together in a linear fashion, forming the backbone of organic molecules.

2. Determine the number of carbon atoms you are interested in, which in this case is between twelve and twenty.

3. To identify the possible carbon chains within this range, you can create a list of all the different chain lengths that fall within the given range. In this case, the list would include chains with 12, 13, 14, 15, 16, 17, 18, 19, and 20 carbon atoms.

4. Each of the numbers obtained represents a different possibility for a carbon chain with the specified length. For example, a carbon chain with 12 carbon atoms is called "dodecane," while a chain with 13 carbon atoms is called "tridecane," and so on.

Therefore, carbon chains between twelve and twenty carbon atoms long include dodecane (12), tridecane (13), tetradecane (14), pentadecane (15), hexadecane (16), heptadecane (17), octadecane (18), nonadecane (19), and eicosane (20).