During an endothermic reaction, H for the reactants was – 200
kJ/mol. What range of values
could the H for the products be
for this reaction?

Answer:

5.6⋅10−^19  j

do you need the explaination?

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).