Is the equation below endothermic or exothermic?
2C3H7OH(l) + 9O2(g) 6CO2(g) + 8H2O(g) +1260 kJ

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).

Adialysis unit requires 78.5 l of water.the estimated digit is 5. 

In the question "in a solution of brine  (salt water), what is the  salt? " the correct answer is a solute. a solute is a component of a  solution  dissolved in the solvent.