Question

Which of the following substances are homogeneous and which are heterogeneous?

Options:
A) Homogeneous: Meat pizza, milk, black coffee, salt, hamburger, gasoline (without bubbles)
B) Heterogeneous: Meat pizza, milk, black coffee, salt, hamburger, gasoline (without bubbles)
C) Homogeneous: Meat pizza, milk, black coffee, salt
D) Heterogeneous: Meat pizza, milk, black coffee, salt

Answer 1

Homogeneous mixtures, like black coffee and gasoline, have a uniform composition, while heterogeneous mixtures, such as meat pizza and hamburgers, consist of easily identifiable parts. Elements, compounds, and mixtures have distinct characteristics; sugar is a compound, mercury is an element, and salad dressing is a heterogeneous mixture.

Step-by-step explanation:

Identifying whether a substance is homogeneous or heterogeneous depends on the uniformity of its composition and whether its different components can be visually differentiated. A homogeneous mixture has a uniform composition and its constituents are not easily distinguishable, such as black coffee (assuming it's filtered) or gasoline (without bubbles). Conversely, a heterogeneous mixture has a non-uniform composition with easily identifiable parts, like a meat pizza or a hamburger.

Substances can also be classified as elements, compounds, or mixtures. For instance, table sugar (sucrose) is a compound, mercury is an element, white wine and blood are homogeneous mixtures, whereas ranch-style salad dressing and sand and stones are heterogeneous mixtures.