The question deals with balancing a chemical reaction equation in high school chemistry, involving calculation of molecular coefficients to maintain atom balance following the law of conservation of mass.
The subject of the question relates to chemical reactions and stoichiometry, which are central topics in high school chemistry. Specifically, the question is asking to balance a chemical reaction that involves various compounds. A balanced chemical equation ensures that the same number of atoms for each element is present on both the reactant and product sides of the equation, following the law of conservation of mass. Examples of balancing chemical equations include:
S(s) + O₂(g) → SO₂(g) - Combustion of sulfur to form sulfur dioxide.
2H₂(g) + O₂(g) = 2H₂O(g) - Formation of water from hydrogen and oxygen gases.
H₂(g) + Cl₂ (g) = 2HCl(g) - Formation of hydrogen chloride from hydrogen and chlorine gases.
Balancing equations requires understanding molecular coefficients and subscripts and applying them correctly to maintain the balance of atoms.