Respuesta :

Answer:

13

Explanation:

  • 2H2+O_2—»2H_2O

Moles of O_2

  • Given mass/Molar mass
  • 120/32
  • 3.75mol

1mol.of O_2 produces 2 mol water

Moles of water

  • 3.75(2)
  • 7.5mol

Mass

  • 7.5(18)
  • 135g