Question

in dehydration synthesis reactions, compounds
convert water molecules to hydrogen and oxygen
lose water molecules
convert hydrogen and oxygen to water
gain electrons
gain water molecules

Explanation:

Dehydration synthesis is a chemical reaction where two molecules combine, and a water molecule is removed (lost) in the process. For example, when forming a disaccharide from two monosaccharides, a water molecule is released. The other options are incorrect: converting water to H and O is decomposition, converting H and O to water is hydration/synthesis of water, gaining electrons is reduction, and gaining water is hydrolysis (opposite of dehydration synthesis).

Answer:

lose water molecules