Final answer:
The purpose of multiplying in the second step of solving a chemical net equation is to balance the chemical equation, ensuring the number of atoms for each element is the same on both sides as per the law of conservation of mass.
Step-by-step explanation:
The reason to multiply the second step in a chemical net equation is A) To balance the equation. This is crucial in chemical reactions to ensure that the law of conservation of mass is adhered to, meaning that the number of atoms for each element must be the same on both the reactants and products side of the equation.
Various strategies to achieve a balanced equation involve converting mass or volume of reactants to moles using their molar mass, determining the limiting reactant based on stoichiometry, and use of mole ratios to predict the amount of product formed and potentially the excess of the other reactants.
During the process of solving chemical equations, it's essential to first write a balanced chemical equation, convert given information into moles, compare calculated mole ratios to the actual ratios from the equation, and then calculate the amount of products produced and excess reactants left over.