Question

Cuantos moles de h2 se requieren para producir 0.400 moles de h2o .

Answer 1

                             2H2 + O2 →  2H2O

mol H2 =  0.400 mol H2O x 2 mo H2
                                            ````````````
                                            2 mol H2O

mol H2 =  0.400