B. 2 molekul E. 15 molekul C. 5 molekul 23. Jika tertulis 3 Ca_(3)(PO_(4))_(2) maka ini berarti bahwa dalam 3 molekul Al_(2)(SO_(4))_(3) terdapat.. __ A. 25 atom B. 30 atom C. 39 atom D. 47 atom E. 51 atom

The correct answer is **E. 51 atom**.Here's how to break down the problem:* **Understanding the Formula:** The formula represents one molecule of aluminum sulfate. * **Counting Atoms:** * **Aluminum (Al):** There are 2 aluminum atoms. * **Sulfur (S):** There are 3 sulfur atoms. * **Oxygen (O):** There are 12 oxygen atoms (3 groups of 4 oxygen atoms each).* **Total Atoms:** 2 + 3 + 12 = 17 atoms in one molecule of .* **Three Molecules:** Since we have 3 molecules, we multiply the number of atoms per molecule by 3: 17 atoms/molecule * 3 molecules = 51 atoms.**Therefore, in 3 molecules of , there are 51 atoms.**