Chemistry

Question Analysis
This question involves calculating the percent composition of a single element (oxygen) in a simple compound (H₂O).
The main focus is on applying the percent composition formula correctly.

Key Concept Explanation
Percent composition of an element = (mass of the element in 1 mole of compound / molar mass of compound) × 100%

Step-by-Step Solution
1. Mass of O in H₂O = 16.0 g/mol
2. Molar mass of H₂O = 18.0 g...