A combustion reaction has reactants 1 mole of CxHy and 2 moles of O2 and products 1 mole of CO2 and 2 mole of H2O, what is x + y?(a) 1(b) 3(c) 4(d) 5The question was posed to me in an interview for job.I'd like to ask this question from Material Balance Concept in chapter Introduction to Material Balances of Basic Chemical Engineering

A combustion reaction has reactants 1 mole of CxHy and 2 moles of O2 a

1.	A combustion reaction has reactants 1 mole of CxHy and 2 moles of O2 and products 1 mole of CO2 and 2 mole of H2O, what is x + y?(a) 1(b) 3(c) 4(d) 5The question was posed to me in an interview for job.I'd like to ask this question from Material Balance Concept in chapter Introduction to Material Balances of Basic Chemical Engineering
Answer» The correct answer is (d) 5 The best I can explain: MOLES of C, H and O in REACTANTS = Moles of C, H and O in products, => C: 1x = 11 => x = 1, H: 1y = 22 => x + y = 5.

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