Diatomic Molecule: Diatomic molecules consist of two atoms chemically bonded together, like H₂ or O₂.
Combustion: Combustion is a chemical reaction between fuel (like hydrogen) and oxygen that releases heat energy.
Molar Mass: Molar mass refers to the mass of one mole of substance measured in grams per mole (g/mol). For hydrogen gas, its molar mass would be 2 g/mol.