Final answer:
The chemical compound Hg3(PO4)2 contains 6 atoms of Mercury (Hg).
Step-by-step explanation:
The question is asking for the number of Hg (Mercury) atoms in the chemical compound Hg3(PO4)2. To answer this question, you need to look at the subscript immediately after Hg in the formula, which in this case is 3. However, the whole compound has a multiplicative factor of 2 (indicated by the 2 after the parenthesis). Therefore, you need to multiply these two numbers together. So, the number of Hg atoms in Hg3(PO4)2 is 3 x 2 which equals to 6.
Learn more about Chemical Composition