Sodium bicarbonate (also known as baking soda) has the molecular formula of Na2HCO3. It comprising elements are sodium (Na), hydrogen (H), carbon (C) and oxygen (O). Sodium bicarbonate as a molecular mass of 84.01 grams per mole.
Na2HCO3 or sodium bicarbonate is also known by the name baking soda.
Na2HCO3 -------- Na2CO3 + H2O + CO2
Sodium Bicarbonate and Sodium Hydrogen Carbonate are different names for the same chemical, Na2HCO3. Specifically, the "HCO3(2-)" part is called a "polyatomic ion", which essentially means it has an electrical charge. It has two names, and those names refer to the same exact chemical.