1. Determine the chemical formula of water:

* Water's chemical formula is H₂O, meaning each molecule contains 2 hydrogen atoms (H) and 1 oxygen atom (O).

2. Calculate the molar mass of water:

* The molar mass of hydrogen (H) is approximately 1 g/mol.

* The molar mass of oxygen (O) is approximately 16 g/mol.

* The molar mass of water (H₂O) is (2 * 1 g/mol) + (1 * 16 g/mol) = 18 g/mol.

3. Convert the mass of water to moles:

* You provided the mass of water as 2.95. However, the units are missing. Assuming you meant 2.95 grams (g) of water:

* Moles of water = (2.95 g) / (18 g/mol) = 0.164 mol

4. Calculate the moles of hydrogen atoms:

* Since each mole of water contains 2 moles of hydrogen atoms:

* Moles of hydrogen = (0.164 mol water) * (2 mol H / 1 mol water) = 0.328 mol H

Therefore, there are approximately 0.328 moles of hydrogen in 2.95 grams of water.