Final answer:
The correct formula for a compound containing Be and PO4 is Be(PO4)2.
Step-by-step explanation:
The correct formula for a compound containing Be and PO4 is Be(PO4)2.
To determine the formula, we need to balance the charges of the Be ion and the PO4 ion. The PO4 ion has a charge of 3-, and since the Be ion has a charge of 2+, we need two PO4 ions to balance the charge.
Therefore, the formula is Be(PO4)2.