Chemistry

Question Analysis
This question tests the student's ability to convert the number of molecules to the number of moles using Avogadro's number.

Key Concept Explanation
The number of moles of a substance can be calculated by dividing the number of molecules by Avogadro's number.

Step-by-step Solution
1. Identify the number of molecules of : molecules.
2. Use the formula to calculate the number of moles:

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