The number of carbon atoms in a starch molecules depends on the type of starch to which you are referring. Starches are carbohydrates and there are two main types, amylose and amylopectin.
There are 5 atoms of carbon in a xylose molecule.
A pentane molecule has 5 carbon atoms and 12 hydrogen atoms.
There are four carbon atoms in a molecule of isobutane.
6 carbon atoms
6
There are 2 carbon atoms in one molecule of tetraethyl.
There are three carbon atoms and three oxygen atoms in each pyruvate molecule.
A carbon tetrafluoride molecule has one carbon atom and four fluorine atoms.
Glucose (C6H12O6) is a monosaccharide that contains twelve hydrogen atoms, six carbon atoms and six oxygen atoms. A glucose and fructose molecule combine to create a sucrose molecule.
The number of carbon atoms in one molecule od dextrose is 6. Its molecular formula is C6H12O6.
There are two carbon atoms in the molecule ethanol (C2H5OH).
Carbon tetrachloride (CCl4) has 4 chloride atoms.