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Clark Kent

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glum plum
This seems complicated, but it's easier than you'd think. Your given a list of elements, and it states that the effective nuclear charge will be in the order given. The easiest way to solve this problem is to solve the first element, and see if it's Z eff
Okay, First write out all of the balanced equations of combustion(A combustion equation is just adding O2 to the reactant, and ending with CO2 in the products. Notice, if H is in the reactants, you'll need H2O to balance the products: Coal: C+O2-->CO2

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