The atomic symbol for Iron is Fe, as the Latin word for Iron is <em>ferrum</em>.
it is either "aweak acid or a lousy (or very weak) acid"
Answer and Explanation:
For the following balanced reaction:
PCl₅(g) ↔ PCl₃(g) + Cl₂(g)
We can see that all reactants and products are gases, so it is an homogeneous equilibrium. The expression for the equilibrium constant Kp can be written from the partial pressures (P) of reactants and products as follows:

Where PPCl₃ is the partial pressure of PCl₃ (reactant), PCl₂ is the partial pressure of Cl₂ (reactant) and PPCl₅ is the partial pressure of PCl₅ (product).
The compound is Al2O3. The ratio of aluminum to oxygen is 2:3.
Configuration of carbon is 1s2 2s2 2p2 and the rest of all is correct