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{"ops":[{"insert":"I have a few main questions regarding rocket fuel and its catalysts: \n- What is the catalyst in the reaction between liquid hydrogen and liquid oxygen in a liquid-propellant rocket engine? (if there is one and why?) (the balanced chemical equation for the reaction is 2H2 + O2 \u2192 2H2O) \n- What is the catalyst in the reaction between aluminum powder and ammonium perchlorate in a solid-propellant rocket engine? (if there is one and why?) (the balanced chemical equation for the reaction is 10Al + 6NH4ClO4 \u2192 4Al2O3 + 2AlCl3 +12H2O + 3N2) \n- What type of chemical reaction is the reaction for the aforementioned solid engine reaction (the reaction between aluminum powder and ammonium perchlorate), and why? (e.g. combustion, decomposition, etc.) Also, is it an endothermic or exothermic equation, and why? \n- What are the disposal methods for the unreacted reactants in both reactions (for the reactions in both the solid and liquid engines)? \n\n"}]}
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