1. Determine the molar mass of water:
* Hydrogen (H) has a molar mass of approximately 1.01 g/mol.
* Oxygen (O) has a molar mass of approximately 16.00 g/mol.
* Water (H₂O) has a molar mass of (2 * 1.01) + 16.00 = 18.02 g/mol
2. Calculate the mass of hydrogen in water:
* There are two hydrogen atoms in each water molecule, so the total mass of hydrogen is 2 * 1.01 g/mol = 2.02 g/mol
3. Calculate the percent composition of hydrogen:
* (Mass of hydrogen / Molar mass of water) * 100%
* (2.02 g/mol / 18.02 g/mol) * 100%
* ≈ 11.21%
Therefore, the percent composition of hydrogen in water is approximately 11.21%.
