Question

instructions: classify each of the following as an element e, a compound c, or a mixture m.

1. gold
2. water
3. seawater
4. sugar
5. a chocolate sundae
6. air
7. carbon dioxide
8. silver
9. ice
10. a big mac®

Explanation:

1. Gold: Pure substance with one type of atom (Au).
2. Water: Pure substance made of H₂O molecules (two elements bonded).
3. Seawater: Contains water, salt, and other dissolved substances (physically mixed).
4. Sugar: Pure substance made of C₁₂H₂₂O₁₁ molecules (multiple elements bonded).
5. Chocolate sundae: Contains ice cream, chocolate, toppings (physically mixed).
6. Air: Contains nitrogen, oxygen, argon, etc. (physically mixed gases).
7. Carbon dioxide: Pure substance made of CO₂ molecules (two elements bonded).
8. Silver: Pure substance with one type of atom (Ag).
9. Ice: Solid form of H₂O, a pure compound of hydrogen and oxygen.
10. A Big Mac®: Contains bread, meat, veggies, sauce (physically mixed components).

Answer:

1. [E] Gold
2. [C] Water
3. [M] Seawater
4. [C] Sugar
5. [M] A chocolate sundae
6. [M] Air
7. [C] Carbon dioxide
8. [E] Silver
9. [C] Ice
10. [M] A Big Mac®