View Single Post
  #2 (permalink)  
Vecchio 12-26-2011, 01:13 PM
DNAnna DNAnna non è in linea
Senior Member
 
Registrato dal: Nov 2011
Messaggi: 568
predefinito

Pb2Ox + H2 -> 2Pb

Pb = 207.2g/mol

0.725g / 207.2g/mol = 3.5*10^-3mol

Pb2Ox : Pb = 1 : 2

Pb2Ox = Pb * 1 / 2 = 1.75*10^-3 mol

PM = 0.800g / 1.75*10^-3 mol = 457.3 g/mol = 2Pb + Ox = 414.4 + 16x

x = (457.3 - 414.4) / 16 = 2.7 => circa 3

Pb2O3
Rispondi quotando