The number of oxygen atoms in a sugar molecule depends on the specific type of sugar. Here are a few examples:

* Glucose (C6H12O6): This is a simple sugar with 6 oxygen atoms.

* Fructose (C6H12O6): Another simple sugar, also with 6 oxygen atoms.

* Sucrose (C12H22O11): This is a disaccharide (two sugar molecules linked together) with 11 oxygen atoms.

In general, the formula for a simple sugar is (CH2O)n, where n represents the number of carbon atoms in the molecule. This means that the number of oxygen atoms will always be equal to the number of carbon atoms.