What is the mass percent of hydrogen in hydrogen peroxide, H2O2?
The molar mass of hydrogen peroxide (H2O2) is 34.0147 g/mol.
The molar mass of hydrogen in H2O2 is 2.01588 g/mol.
Now, we can calculate the mass percent of hydrogen in hydrogen peroxide:
Mass percent = (Mass of hydrogen / Mass of H2O2) x 100
= (2.01588 g/mol / 34.0147 g/mol) x 100
≈ 5.93%
Therefore, the mass percent of hydrogen in hydrogen peroxide is approximately 5.93%.