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JEE MainChemistrySome Basic Concepts of Chemistry

0.05 ~mol of an organic compound having a molar mass of 150 ~g , mol ⁻¹ and containing 40 % carbon by mass is subjected to complete combustion. The mass of CO ₂ produced is _____ g .

Correct answer

11

Step-by-step solution

Total mass of the organic compound taken for combustion: W = moles molar mass = 0.05 150 = 7.5 ~g Mass of carbon present in this sample: W_ C = 40 % of 7.5 ~g = 40 100 7.5 = 3.0 ~g Moles of carbon in the sample: n_ C = 3.0 12 = 0.25 ~mol Applying the Principle of Atomic Conservation (POAC) for carbon, all the carbon in the compound is converted to CO ₂ . Moles of CO ₂ produced = Moles of C = 0.25 ~mol Mass of CO ₂ produced: W_ CO ₂ = n_ CO ₂ Molar mass of CO ₂ = 0.25 44 = 11 ~g Answer: 11

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