Final answer:
The correct formula for ammonium phosphate is (NH4)3PO4, balancing the charges of the ammonium and phosphate ions to form a neutral compound.
Step-by-step explanation:
The appropriate chemical formula for ammonium phosphate is (NH4)3PO4. This is because the ammonium ion (NH4+) has a +1 charge and the phosphate ion (PO43-) has a -3 charge. To obtain an electrically neutral compound, three ammonium ions are needed to balance one phosphate ion, which gives us the formula (NH4)3PO4.The chemical formula for ammonium phosphate is (NH₄)₃PO₄. The compound is formed by the combination of the ammonium ion (NH₄⁺) and the phosphate ion (PO₄³⁻).