
Concept explainers
Interpretation: The coefficient for iron in the balanced reaction of iron(II) oxide and carbon to form iron and carbon dioxide needs to be determined.
Concept Introduction: Chemical equation is written in such a way that the symbolic representation of reaction represents the reaction taking place in the system. The reactants are written on the left-hand side and the products are written on the right-hand side of the equation and are separated by an arrow, two or more reactants and products are separated by “+”.
The reactions for which the number of atoms of each element in the reactant and in the product, side are equal, such reactions are said to be a balanced chemical equation.

Answer to Problem 6STP
The correct option is (b): 2.
Explanation of Solution
The chemical formula of involved compounds and elements are:
So, the
The reaction is not balanced as the number of O atoms in the reactant side is 1 and on the product side is 2. So, in order to balance the reaction, coefficient 2 is written before FeO on the reactant side and coefficient, 2 is written before Fe on the product side. So, the balanced chemical reaction is:
Hence, the coefficient for iron in the balanced reaction of iron(II) oxide and carbon to form iron and carbon dioxide is 2.
Chapter 7 Solutions
World of Chemistry, 3rd edition
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