Questions: a. Find the examples of mixtures. (Select all that apply.) sand in water acetone in water b. Find the examples of elements. (Select all that apply.) aluminum oxygen chlorine c. Find the examples of physical properties or changes. (Select all that apply.) color density

a. Find the examples of mixtures. (Select all that apply.) sand in water acetone in water b. Find the examples of elements. (Select all that apply.) aluminum oxygen chlorine c. Find the examples of physical properties or changes. (Select all that apply.) color density
Transcript text: a. Find the examples of mixtures. (Select all that apply.) sand in water acetone in water b. Find the examples of elements. (Select all that apply.) aluminum oxygen chlorine c. Find the examples of physical properties or changes. (Select all that apply.) color density
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Solution

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Solution Steps

Step 1: Identify Mixtures

We need to identify which of the given options are mixtures. Mixtures are combinations of two or more substances that are not chemically bonded.

  • Air: Mixture of gases (e.g., nitrogen, oxygen).
  • Oil in water: Mixture of two immiscible liquids.
  • Brass: Alloy of copper and zinc.
  • Foam: Mixture of gas in a liquid or solid.
  • Sand in water: Heterogeneous mixture.
  • Acetone in water: Homogeneous mixture.

All the given options are mixtures.

Step 2: Identify Elements

We need to identify which of the given options are elements. Elements are pure substances consisting of only one type of atom.

  • Salt: Compound (sodium chloride).
  • Aluminum: Element.
  • Hydrogen peroxide: Compound (H\(_2\)O\(_2\)).
  • Oxygen: Element.
  • Chlorine: Element.
  • Carbon dioxide: Compound (CO\(_2\)).

The elements are aluminum, oxygen, and chlorine.

Step 3: Identify Physical Properties or Changes

We need to identify which of the given options are physical properties or changes. Physical properties or changes do not involve a change in the chemical composition of the substance.

  • Milk becomes sour: Chemical change.
  • Color: Physical property.
  • Burning: Chemical change.
  • Density: Physical property.

The physical properties or changes are color and density.

Final Answer

a. Mixtures: \[ \boxed{\text{Air, Oil in water, Brass, Foam, Sand in water, Acetone in water}} \]

b. Elements: \[ \boxed{\text{Aluminum, Oxygen, Chlorine}} \]

c. Physical properties or changes: \[ \boxed{\text{Color, Density}} \]

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