Find the percent composition of hydrogen in water, H₂O. The ...

Question Analysis
This question tests the student's ability to calculate the percent composition of an element in a simple compound.

Key Concept Explanation
The percent composition of an element in a compound is found by dividing the total mass of that element in one mole of the compound by the molar mass of the compound, then multiplying by 100%.

Step-by-step Solution
1. Identify the total mass of hydrogen in one mole of water: .
2. Use the formula for percent composition:

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