Identify the labeled parts in the figure. Chemical formula Al2O3 and chemical formula 2H2O. Al is labeled a. Subscript 2 is labeled b. O is labeled c. Subscript 3 is labeled d. 2 is labeled e. H is labeled f. Subscript 2 is labeled g.O is labeled h. There's an i where a subscript would be on the letter O. i. Which of the labeled parts is a chemical symbol? ii. Which of the labeled parts is a coefficient? iii. Which of the labeled parts is the number of atoms of the element? iv. Which of the labeled parts indicates that only one atom of the element is present in the substance?