Final answer:
The coefficient of the product P2O3 in the chemical equation P4 + 3O2 → 2P2O3 is 2, representing the stoichiometry in the balanced reaction.
Step-by-step explanation:
The coefficient of the product in the chemical equation P4 + 3O2 → 2P2O3 indicates the relative number of moles of each substance involved in the reaction. In this equation, the coefficient for the product P2O3 is 2. This means that for every one mole of P4 that reacts with three moles of O2, two moles of P2O3 are produced. The coefficient represents the stoichiometry or the quantitative relationship between reactants and products in a balanced chemical equation.
The correct answer to the question is B. 2, which is the coefficient of the product P2O3 in the balanced chemical equation.