During dehydration synthesis, a molecule is produced.

*** Remember ***  Dehydration synthesis is when two molecules are joined together, by removing a water molecule. Also a key thing to remember is that dehydration can be remembered as "losing water". 

During dehydration synthesis, a    water    molecule is produced. 

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Only one reactant yields 2 or more products. meaning you will only have 1 product and it will break down into 2 or more products. eg. h2o -> h2 + o2

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