Question

1. identify each of the following items as a mixture or compound. classify the mixtures as homogeneous or heterogeneous. a. raw egg b. ice c. gasoline d. blood

Explanation:

To solve this, we recall the definitions:

• Compound: Pure substance with fixed composition (atoms chemically bonded).
• Mixture: Combination of substances (not chemically bonded), either homogeneous (uniform) or heterogeneous (non - uniform).

Part a: Raw egg

A raw egg has components like egg white, yolk, and shell membrane (or shell). These components are not uniformly distributed, and the substances in the egg (proteins, water, fats, etc.) are mixed but not chemically bonded in a fixed ratio. So, it is a heterogeneous mixture.

Part b: Ice

Ice is solid water ($\ce{H_2O}$). It has a fixed chemical composition (two hydrogen atoms and one oxygen atom per molecule) and is a pure substance formed by chemical bonding. Thus, it is a compound.

Part c: Gasoline

Gasoline is a blend of various hydrocarbons (like octane, heptane, etc.) and additives. The mixture has a uniform appearance (you can't see the individual components), so it is a homogeneous mixture.

Part d: Blood

Blood contains cells (red blood cells, white blood cells), platelets, and plasma. These components are not uniformly distributed (you can distinguish cells from plasma under a microscope), so it is a heterogeneous mixture.

Final Answers:

a. Raw egg: Heterogeneous mixture
b. Ice: Compound
c. Gasoline: Homogeneous mixture
d. Blood: Heterogeneous mixture

Answer:

To solve this, we recall the definitions:

• Compound: Pure substance with fixed composition (atoms chemically bonded).
• Mixture: Combination of substances (not chemically bonded), either homogeneous (uniform) or heterogeneous (non - uniform).

Part a: Raw egg

A raw egg has components like egg white, yolk, and shell membrane (or shell). These components are not uniformly distributed, and the substances in the egg (proteins, water, fats, etc.) are mixed but not chemically bonded in a fixed ratio. So, it is a heterogeneous mixture.

Part b: Ice

Ice is solid water ($\ce{H_2O}$). It has a fixed chemical composition (two hydrogen atoms and one oxygen atom per molecule) and is a pure substance formed by chemical bonding. Thus, it is a compound.

Part c: Gasoline

Gasoline is a blend of various hydrocarbons (like octane, heptane, etc.) and additives. The mixture has a uniform appearance (you can't see the individual components), so it is a homogeneous mixture.

Part d: Blood

Blood contains cells (red blood cells, white blood cells), platelets, and plasma. These components are not uniformly distributed (you can distinguish cells from plasma under a microscope), so it is a heterogeneous mixture.

Final Answers:

a. Raw egg: Heterogeneous mixture
b. Ice: Compound
c. Gasoline: Homogeneous mixture
d. Blood: Heterogeneous mixture