Chemistry

Question Analysis
This question evaluates the student's ability to apply Avogadro’s number and stoichiometric relationships to determine the number of atoms in a given number of molecules.

Key Concept Explanation
Each molecule of water (H₂O) contains 3 atoms (2 hydrogen atoms and 1 oxygen atom). Avogadro’s number, , represents the number of particles in one mole.

Step-by-step Solution
1. Identify the number of atoms per molecule of water: 3 atoms.
2. Determine the number of molecules given: molecules.
3. Calculate the total number of atoms:

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