In the balanced chemical reaction, the coefficients represent the mole relationship of each substance needed or produced in the reaction.

In the balanced chemical reaction, the coefficients represent the mole relationship of each substance needed or produced in the reaction.  These coefficients can be used to show the relationship between only two substances and when written as a ratio (x mols of A / y mol of B) it is called the molar ratio.  What is the molar ratio between sodium sulfate and sulfuric acid?