Airbags are used in cars for safety. They contain sodium nitride (NaN3), potassium nitrate (KNO3), and silica(SiO2). When a car undergoes a collision, a series of three chemical reactions inside the gas generator produces nitrogen gas (N2) to fill the airbag and converts dangerous by-products into harmless and stable silicate glass (Na2K2SiO4). The chemical equations for these reactions are Reaction 1 : 2NaN3 ----> 2Na + 3N2 Reaction 2 : 10Na + 2KNO3 ----> K2O + 5Na2O + N2 Reaction 3 : K2O + Na2O + SiO2 ----> Na2K2SiO4 The balanced overall chemical reaction for the gas producing reactions (1 and 2) is
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