Question

Cuantos gramos de un hidrogeno y cuantos gramos dd oxigeno debemos hacer reaccionar para obtener 150 gramos de agua

Answer 1

                           4H2 + O2 →  2H2O
Mm H2O = 18 g/mol          H2 = 2 g/mol          O2 = 32 g/mol
a. calcular gramos de H2
g H2 = 150 g H2O  x  1 mol H2O  x  2 mol H2  x  2 g H2                                  ````````````````   ``````````````    ````````````                                   18  g H2O     2 mol H2O    1 mol H2
g H2 = 16.66
b) gramos de O2
g H2 = 150 g H2O  x  1 mol H2O  x  1 mol O2  x  32 g O2                                  ````````````````   ``````````````    ````````````                                   18  g H2O     2 mol H2O    1 mol O2
g O2 = 133.33