A student plans to sketch the simplest particulate diagram that accurately represents the reaction 2SO2(g)+O2(g)→2SO3(g). Which combination of reactant molecules must be shown in the diagram before the reaction takes place?
a) 2 SO2 molecules and 2 O2 molecules
b) 1 SO2 molecule and 1 O2 molecule
c) 2 SO2 molecules and 1 O2 molecule
d) 4 SO2 molecules and 2 O2 molecules