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A fuel gas (dry) has: CH₄ 40%, H₂ 30%, CO 20%, N₂ 10% (mole). It is burned completely with 20% excess dry air (take air as 21% O₂/79% N₂). Neglect dissociation; report dry flue gas. What is the mole percent of O₂ in the dry flue gas?
0%
7%
5%
7.4%
7%
Practice and solve "A fuel gas (dry) has: CH₄ 40%, H₂ 30%, CO 20%, N₂ 10% (mole). It is burned completely with 20% exces..." for Technical Knowledge - HRRLAssistant Engineer Chemical 2026. The correct answer is Option B: 7%. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Practice and solve "A fuel gas (dry) has: CH₄ 40%, H₂ 30%, CO 20%, N₂ 10% (mole). It is burned completely with 20% exces..." for Technical Knowledge - HRRLAssistant Engineer Chemical 2026. The correct answer is Option B: 7%. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.