Final answer:
The ratio from a chemical reaction can be used to calculate unknown mole quantities or molar mass by using stoichiometry, which includes converting mass to moles, using mole ratios, determining limiting reactants, and calculating percent yield.
Step-by-step explanation:
The ratio determined by a chemical reaction can be used to calculate an unknown by employing stoichiometry, which is the study of the numerical relationships between reactants and products in balanced chemical reactions. First, a balanced chemical equation must be determined. Next, the mass of the given substance is converted into moles by using the molar mass from the periodic table. Then, these moles are converted into moles of the unknown substance by using the mole ratio from the balanced equation. This process can help identify the limiting reactant, determine the theoretical yield of the product, and calculate the percent yield by comparing the actual yield to the theoretical yield.
To accurately determine the molar mass of an unknown substance, one would need additional information such as changes in physical properties (e.g., boiling point) or mass measurements from an experiment. The chosen tactics for finding the molar mass, percent yield, or theoretical yield are all significant components of stoichiometry.