The mass of the sulfuric acid that we have is 98 g.
The law of conservation of mass
One of the cornerstones of chemistry is the law of conservation of mass, which states that during a chemical reaction in a closed system, the total mass of the constituents stays constant. This implies that the mass of the reactants and products before and after a chemical reaction must be equal. Put differently, during chemical reactions, atoms are rearranged rather than generated or destroyed.
We know that the total mass of the system = Mass of products - mass of reactants.
Let the mass of the sulfuric acid be x
We know that; 136 + 36 = 74 + x
x = 98 g