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A 60 g sample of an organic compound with empirical formula CxHyO undergoes complete combustion, producing 88 g of CO2 and 36 g of H2O. Find the value of (x + y).

1. 3
2. 4
3. 5
4. 6

Correct answer: 3

Solution

From combustion data, the molar ratio of C:H:O in the compound is 1:2:1, giving empirical formula CH2O. Thus x = 1, y = 2, and x + y = 3.

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