Question

H2 + O2 => _____

(a) H2O

(b) OH

(c) H3O

(d) 2H2O

I have been asked this question by my college professor while I was bunking the class.

Query is from Combustion of Fuels topic in section Steam Power Plant of Energy Engineering

Answer 1

Right choice is (d) 2H2O

To explain I would say: Based on molecular weight, 32kg of sulfur combines with 32kg of oxygen forming 36kg of water.

                                 Balanced equation: 2H2 + O2 => 2H2O

                                 4kg of H2 + 32kg of O2 => 36kg of H2O

                                 1kg of H2 + 8kg of O2 => 9kg of H2O.