3. How many milliliters of 2.0M H, SO, are needed to completely neutralize 500 mL of a 1.0M KOH solution?

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Answer/nitrogen compounds in the soil;

The answer to your q the total mass is 73