The two molecules in the image are: Water (H2O) and Ethanol (C2H6O)
Water is a compound of hydrogen and oxygen, and is the universal solvent. It is essential for life, and is found in all living organisms.
Ethanol is a type of alcohol, and is the main intoxicating ingredient in alcoholic beverages. It is also used as a fuel, solvent, and disinfectant.
Both water and ethanol are polar molecules, meaning that they have a positive and negative end. This makes them good at dissolving other polar molecules, such as salt and sugar.
Here is a table summarizing the key properties of water and ethanol attached below.