Multiple Choice
Iron ore and ________ are necessary resources for the production of steel. Which of the following best completes the sentence?
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1. Intro to General Chemistry
Classification of Matter
Multiple Choice
Which of the following best describes aluminum foil in terms of the classification of matter?
A
Colloid
B
Heterogeneous material
C
Compound
D
Homogeneous material
Verified step by step guidance1
Step 1: Understand the classification of matter categories given: colloid, heterogeneous material, compound, and homogeneous material.
Step 2: Recall that a compound is a substance made of two or more elements chemically combined in fixed proportions, which aluminum foil is not, since it is a pure element (aluminum).
Step 3: Recognize that a heterogeneous material has visibly different parts or phases, which aluminum foil does not exhibit as it appears uniform throughout.
Step 4: Know that a colloid is a mixture where particles are dispersed but not dissolved, often showing some scattering of light, which does not describe aluminum foil.
Step 5: Conclude that aluminum foil is a homogeneous material because it is uniform in composition and appearance throughout, consisting of only aluminum atoms arranged consistently.
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