How can you tell c4 from c6?

C4 and C6 refer to different types of carbon chains in organic chemistry. C4 indicates a four-carbon chain, while C6 refers to a six-carbon chain. You can distinguish between them by examining their molecular structure or formula; C4 has the formula C4H10 for alkanes, while C6 has C6H14. Additionally, their physical properties, such as boiling points, will differ due to the varying chain lengths.