molecular weight determination

Molecular weight determination measures the mass of a molecule, expressed in atomic mass units (amu) or grams per mole (g/mol). This is calculated by adding the weights of all the atoms in a molecule, based on their chemical composition. For example, water (H₂O) has two hydrogen atoms and one oxygen atom. By looking up the weights of these atoms (hydrogen is about 1 g/mol, oxygen about 16 g/mol), we find water’s molecular weight is about 18 g/mol. This information is crucial in chemistry for understanding reactions, concentrations, and properties of substances.