there is not enough information to make a prediction as we dont know what side she taped on magnet C
First you need to calculate the number of moles of aluminium and copper chloride.
number of moles = mass / molecular weight
moles of Al = 512 / 27 = 19 moles
moles of CuCl = 1147 / 99 = 11.6 moles
From the reaction you see that:
if 2 moles of Al will react with 3 moles of CuCl
then 19 moles of Al will react with X moles of CuCl
X = (19 × 3) / 2 = 28.5 moles of CuCl, way more that 11.6 moles of CuCl wich is the quantity you have. So the copper chloride is the limiting reagent.
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Answer : The correct alphabetical order will be, CDE
Explanation :
Equilibrium constant : It is defined as the ratio of concentration of products to the concentration of reactants. It is represented as
.
The given balanced equilibrium reaction is,

As we know that the concentrations of pure solids are constant that means they do not change. Thus, they are not included in the equilibrium expression.
The expression for equilibrium constant for this reaction will be,

or,

From the expression of equilibrium constant we conclude that the alphabetical order will be, CDE.
Hence, the correct alphabetical order will be, CDE