Respuesta :

At STP 1mol of gas weighs 22.4L

Moles of chlorine

  • 18.40/22.4
  • 0.8mol

Now

  • 3mols of chlorine produces 2 mol AlCl_3
  • 1 mol of chlorine produces 0.6mol AlCl_2

Moles of AlCl_3

  • 0.8(0.6)
  • 0.5mol

Mass of AlCl_3

  • 0.5(133)
  • 6.5g