label each substance listed below as an element (e), compound (c), heterogeneous mixture (he), or…

Brief Explanations:

1. Barium (Ba) is an element as it consists of only one type of atom.
2. Carbon Monoxide (CO) is a compound as it is made up of two different elements (carbon and oxygen) chemically combined.
3. Soil is a heterogeneous mixture as it has visibly different components like sand, clay, organic matter etc.
4. Kool - Aid is a homogeneous mixture as it is a uniform solution when dissolved in water.
5. Brass (CuZn) is a homogeneous mixture (an alloy) as the metals are uniformly mixed at the atomic level.
6. Air is a homogeneous mixture as it is a uniform combination of nitrogen, oxygen, carbon - dioxide etc.
7. Vegetable soup is a heterogeneous mixture as it has distinct visible parts like vegetables, broth etc.
8. Carbon (C) is an element as it consists of only carbon atoms.
9. Baking Soda ($NaHCO_3$) is a compound as it is made up of sodium, hydrogen, carbon and oxygen chemically bonded.
10. Jello with fruit is a heterogeneous mixture as the fruit pieces are distinct from the jello.
11. Gold (Au, not Ag which is silver) is an element.
12. Milk is a homogeneous mixture (a colloid) as it appears uniform.
13. Sand is a heterogeneous mixture as it contains different sized particles and may have different minerals.
14. Orange juice w/o pulp is a homogeneous mixture as it is a uniform liquid.
15. Orange juice w/pulp is a heterogeneous mixture as the pulp is a distinct part from the liquid juice.

Answer:

1. E
2. C
3. He
4. Ho
5. Ho
6. Ho
7. He
8. E
9. C
10. He
11. E
12. Ho
13. He
14. Ho
15. He