Problem: What is the coefficient for iron metal after the following reaction is balanced:_?_ Fe (s) + _?_ O2 (g) → _?_ Fe2O3 (s)? A. 1 B. 3 C. 4D. 6 E. 8

FREE Expert Solution

Recall that when balancing chemical equations, we have to make sure that the number of elements on both sides is equal with the lowest whole number coefficients.


Balance O: We have 2 O on the reactant side and 3 N on the product side – add a coefficient of 3 to O2 and add a coefficient of 2 to Fe2O3:

__ Fe(s) + O2(g) → 2 Fe2O3(s)

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Problem Details

What is the coefficient for iron metal after the following reaction is balanced:

_?_ Fe (s) + _?_ O2 (g) → _?_ Fe2O3 (s)? 

A. 1 

B. 3 

C. 4

D. 6 

E. 8

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