Four particulate diagrams (A–D) are proposed for the reaction 2 Al(s) + 3 Cl2(g) → 2 AlCl3(s).
Which diagram correctly represents the balanced reaction?
A. Reactants: 2 single grey spheres labeled Al and 3 pairs of green spheres touching labeled Cl2; Products: 2 units each composed of 1 grey sphere bonded to 3 green spheres.
B. Reactants: 2 Al atoms and 2 Cl2 molecules; Products: 2 units each with 1 Al and 3 Cl atoms.
C. Reactants: 1 Al atom and 3 Cl2 molecules; Products: 2 units each with 1 Al and 3 Cl atoms.
D. Reactants: 2 Al atoms and 3 Cl2 molecules; Products: 3 units each with 1 Al and 3 Cl atoms.
a) Diagram B
b) Diagram D
c) Diagram A
d) Diagram C