1. Determine the Molecular Weight of Water (H₂O)
* Hydrogen (H) has an atomic weight of approximately 1 g/mol.
* Oxygen (O) has an atomic weight of approximately 16 g/mol.
* Water (H₂O) has a molecular weight of (2 * 1) + 16 = 18 g/mol
2. Calculate the Mass Percentage of Hydrogen in Water
* Hydrogen's contribution to the total mass of water is (2 * 1 g/mol) / 18 g/mol = 0.1111 (approximately)
* This means hydrogen makes up about 11.11% of the mass of water.
3. Calculate the Mass of Hydrogen in 25.0g of Water
* Multiply the mass of water by the mass percentage of hydrogen: 25.0 g * 0.1111 = 2.78 g
Therefore, there are approximately 2.78 grams of hydrogen in 25.0 grams of water.
