Final answer:
To balance the given equation F2 + P2 --> PF3, you need to ensure that the number of each type of atom is equal on both sides of the equation. The balanced equation is 2F2 + 1P2 --> 2PF3.
Step-by-step explanation:
To balance the equation F2 + P2 --> PF3, you need to ensure that the number of each type of atom is equal on both sides of the equation. The balanced equation is 2F2 + 1P2 --> 2PF3. This ensures that there are 4 atoms of fluorine and 2 atoms of phosphorus on both sides of the equation.