Caculate how many mole of product would be produced by complete conversion

[Lindsy]

of 1.5mol of the reactant in bold ? State clearly the mole ratio of the conversion.
A)2Mg(bold) +O2=2MgO
B)2Mg+O2(bold)=2MgO
C)4Fe(bold)+3O2=2Fe2O3
D)4Fe+3)2(bold)=2Fe2O3