The molar mass of hydrogen peroxide (H₂O₂) is 34.0147 grams per mole. This value is calculated by adding the atomic masses of its constituent elements: hydrogen and oxygen.
Hydrogen peroxide consists of two hydrogen atoms and two oxygen atoms. The atomic mass of hydrogen is approximately 1.00784 atomic mass units (amu), and the atomic mass of oxygen is approximately 15.999 amu. Therefore, the molar mass of hydrogen peroxide is calculated as follows:
2 (hydrogen atoms) × 1.00784 amu = 2.01568 amu
2 (oxygen atoms) × 15.999 amu = 31.998 amu
Adding these together gives:
2.01568 amu + 31.998 amu = 34.01368 amu
Rounding to four decimal places, the molar mass of hydrogen peroxide is 34.0147 grams per mole.