How much energy is released when the temperature of a 4.4 g piece of iron cools from 270oC to 32oC? (Specific heat of iron is 0.444 J /goC).

Idon't see the pic?

Anions are negative charged ions

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).