What are two ways that you can identify whether a molecule is a carbohydrate?

1. Structure: Carbohydrates are organic compounds that are composed of carbon, hydrogen, and oxygen atoms. They typically have a general formula of Cn(H2O)n. This means that for every carbon atom, there should be two hydrogen atoms and one oxygen atom. If a molecule follows this pattern, it is likely a carbohydrate.

2. Presence of Functional Groups: Carbohydrates often have hydroxyl (-OH) functional groups. If a molecule has multiple hydroxyl groups along with a carbonyl group (C=O), it is likely a carbohydrate.

These are general guidelines and there may be exceptions. For a definitive identification, more sophisticated methods like spectroscopy or chromatography may be needed.