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Mathematics 10 Online
OpenStudy (anonymous):

11 In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate in which heat is evolved and an unreactive gas is produced. What is the equation for this reaction? A 2Al + Ba(NO3)2 → Al2O3 + BaO + 2NO B 4Al + 4Ba(NO3)2 → 2Al2O3 + 4Ba(NO2)2 + O2 C 10Al + 3Ba(NO3)2 → 5Al2O3 + 3BaO + 3N2 D 10Al + 18Ba(NO3)2 → 10Al(NO3)3 + 18BaO + 3N2 answer is C, but why?

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