Question

which of the following is best described by the term macroscopic?
a) water molecules in the solid phase are tightly held together.
b) water is composed of two hydrogen atoms and one oxygen atom.
c) h₂o
d) water in the liquid phase boils to become a gas.

Explanation:

To determine which option is macroscopic, we analyze each:

• Option A: Discusses water molecules (microscopic level, as molecules are too small to see without tools).
• Option B: Describes the atomic composition of water (microscopic, focusing on atoms).
• Option C: Is a chemical formula (represents water at a molecular/microscopic level).
• Option D: Describes water (liquid) boiling to become gas, which is an observable, large - scale (macroscopic) property of water. We can see water boiling and changing phase with our eyes, without needing to look at the molecular or atomic level.

Answer:

D. Water in the liquid phase boils to become a gas.