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To determine the theoretical amount of air required for the complete combustion of coal, we will consider the combustion reactions for the components of coal: 1. Carbon (C): \[ C + O_2 \rightarrow CO_2 \] 2. Hydrogen (H): \[ 2H_2 + O_2 \rightarrow 2H_2O \] 3. Sulfur (S): \[ S + O_2 \rightarrow SO_2 \] 4. Moisture (H_2O): No combustion is required for moisture, but it contributes ___ _______ _____ _______ ________ _________.
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