Lab 27. stoichiometry and chemical reactions: which balanced chemical equation best represents the thermal decomposition of sodium bicarbonate?

             Sodium Bicarbonate on decomposition produces Carbon dioxide gas and Water vapors.

                       2 NaHCO₂  →  Na₂CO₃ (s)  +  CO₂ (g)  +  H₂O (g)

Explanation:
                   Let suppose you burn 168 g ( 2 moles ) of NaHCO₃, a gas will produced and product is left behind. On measuring the product formed it will be almost equal to 105 g. This shows that the product is Na₂CO₃ and 1 mole of it is being produced after decomposition of sodium bicarbonate.

Ithink the answer is b.