he chemical formula for glucose is C6H12O6. Therefore, four molecules of glucose will have blank carbon atoms, blank hydrogen atoms, and blank oxygen atoms.
The molecular formula is C6H12O6 because one molecule actually contains 6 C, 12 H, and 6 O atoms. The simplest whole-number ratio of C to H to O atoms in glucose is 1:2:1, so the empirical formula is CH2O.