The reaction 2K+Br2-> 2KB is a(n) reaction. a. precipitation
b. single- replacement
c. acid -based
d. synthesis

Answer is to avoid experimental error

Ibelieve your answer is true 

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).