A chemical equation is displayed:

Question

4FeS + 7O2 → 2Fe2O3 + 4SO2
Which statement accurately describes the chemical equation?

Answer 1

The chemical equation \( 4FeS + 7O_2 \rightarrow 2Fe_2O_3 + 4SO_2 \) accurately describes the reaction between iron(II) sulfide (FeS) and oxygen (O2) to produce iron(III) oxide (Fe2O3) and sulfur dioxide (SO2). Here are some statements that accurately describe the equation:

1. Conservation of Mass: The equation is balanced, meaning the number of each type of atom on the reactant side (left) is equal to the number on the product side (right).

2. Types of Reaction: This is a combustion reaction, as it involves the burning of a compound (FeS) in the presence of oxygen to produce oxides.

3. Stoichiometry: The coefficients indicate the molar ratios of the reactants and products: 4 moles of FeS react with 7 moles of O2 to produce 2 moles of Fe2O3 and 4 moles of SO2.

4. Oxidation-Reduction: This reaction involves the oxidation of sulfur (in FeS) and the reduction of oxygen, as sulfur goes from a lower oxidation state to sulfur dioxide's higher oxidation state.

These points provide a clear understanding of the chemical reaction depicted by the equation.