Label each substance listed below as an element (E), compound (C), heterogeneous mixture (He), or homogeneous mixture (Ho) 1. E 2. C 3. He 4. Ho 5. HO 6. Hö 7. He 8. E 9. Ho 10. He 11.E Barium (Ba) Carbon Monoxide (CO) Soil Kool-Aid Brass (CuZn) Air Vegetable soup Carbon (C) Baking Soda (NaHCO,) Jello with fruit Gold (Ag) 12. Milk 13. Sand 14. Orange juice w/o pulp 15. Orange juice w/pulp

2nd - Which of the following is false for mixtures?    a) Mixtures have the properties of the substances that make them up.  B) Sandy water is an example of a heterogeneous mixture.  NS) Cologne is an example of a homogeneous mixture.  D) Mixtures are separated into their components by chemical method.  TO) Mixtures are divided into homogeneous and heterogeneous.

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Carbon monoxide is an example of a: Element O Compound O Homogeneous mixture O Heterogeneous mixture

An analytical chemist measures the amount of Elements E₁ and E₂ in four samples of an unknown Substance. sample of E1 1 2 3 mass mass of E2 4 16.0 g 9.1 g 17.1 g 9.8 g 18.5 g 10.6 g 12.0 g 6.9 g It's known that X contains no elements other than E₁ and E₂. Using this information, answer the questions in the table below. Is X a pure substance or a mixture? If you don't have enough information to decide, choose can't decide. If you said X is a pure substance, calculate the mass of Element E₁ the analytical chemist would find in a new 10.0 g sample of X. Round your answer to 2 significant digits. O pure substance O mixture O (can't decide) g

16. While cleaning your attic, you find your old rock collection. If 74.2% of the rocks have a mass of 11.3 g, and the rest of mass of 82 g, what is the average rock mass of your collection?