What is the total number of atoms present in one molecule of Al2(S2O3)3?

• A. 14
• B. 21
• C. 23
• D. 17

Answer: (C)

Verified step by step guidance

1. Identify the chemical formula given: Al\_2(S\_2O\_3)\_3. This means the molecule contains aluminum (Al), sulfur (S), and oxygen (O) atoms.
2. Determine the number of each type of atom inside the parentheses first. The group (S\_2O\_3) contains 2 sulfur atoms and 3 oxygen atoms.
3. Since the group (S\_2O\_3) is multiplied by 3, multiply the number of sulfur and oxygen atoms by 3: sulfur atoms = 2 \times 3, oxygen atoms = 3 \times 3.
4. Count the aluminum atoms outside the parentheses: there are 2 aluminum atoms.
5. Add all the atoms together to find the total number of atoms in one molecule: total atoms = aluminum atoms + total sulfur atoms + total oxygen atoms.