Final answer:
The molar mass of hydrogen, considering its diatomic molecular form (H2), is 2.0158 grams per mole. This value represents the mass of one mole of hydrogen molecules, which corresponds to 6.022 × 10²³ H2 molecules.
Step-by-step explanation:
The molar mass of an element is numerically equivalent to its atomic mass in grams per mole. The atomic mass of hydrogen is 1.008 atomic mass units (amu), which means the molar mass of hydrogen is also 1.008 grams per mole (g/mol). However, it's important to note that elemental hydrogen exists naturally as a diatomic molecule, H2. Therefore, the molar mass of molecular hydrogen (H2) is calculated by adding the atomic masses of the two atoms, which gives us a value of 2.0158 g/mol for one mole of H2 molecules.
Following this, we can say that one mole of hydrogen molecules (H2) is equal to 2.0158 grams. This value takes into account that there are 6.022 × 10²³ molecules of H2 in one mole. Conversion factors derived from these relationships are often used in chemical calculations involving moles and mass.