Acombination of sand, salt, and water is an example of a
1. compound
2.solid
3.pure substance
4.homogeneous mixture
5. heterogeneous mixture.

c. electrical charges of ionic bonds.

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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).