4.7 g of phenol is heated with Zn to give product X. If this reaction goes to 60 % completion then the number of moles of compound X formed will be _______ 10⁻² . (Nearest Integer) (Given molar mass in g mol ⁻¹ : H:1, C:12, O:16)

Step-by-step solution

The chemical reaction of phenol with zinc dust is given by: C₆H₅OH + Zn C₆H₆ + ZnO Product X is benzene ( C₆H₆ ). Molar mass of phenol ( C₆H₅OH ) = 6 12 + 6 1 + 16 = 94 g mol ⁻¹ Number of moles of phenol taken = 4.7 94 = 0.05 mol From the stoichiometry of the reaction, 1 mole of phenol produces 1 mole of benzene. Theoretical moles of X formed = 0.05 mol Since the reaction goes to 60 % completion, the actual moles of X formed is: 0.05 60 100 = 0.03 mol This can be written as 3 10⁻² mol. Answer: 3