What is the expected outcome of adding a catalyst to a chemical reaction?
a.
the reaction will speed up.
b.
chemical equilibrium will not be reached.
c.
the reaction will slow down.
d.
no change will occur.

The expected outcome would be A. The reaction will speed up after adding a catalyst to a chemical reaction.

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).