✔ 最佳答案
2H2 + O2 --> 2H2O
1.44g water has 1.44/18 = 0.08 mole
∴Hydrogen is excess
∵Oxygen is the limited reactant
By the formula, 2 mole of water is produced by 1 mole of oxygen
∵The mole of oxygen is 0.08/2 = 0.04 mole
∵The mass in the oxide is 0.04*32 = 1.28 g
The remaining mass is the mass of the metal X = 13.7-1.28 = 12.42 g
∵The mole of the metal X is 12.42/207 = 0.06 mole
By mole ratio
The relative ratio of the oxygen is 0.04/0.04 = 1
The relative ratio of the metal X is 0.06/0.4 = 1.5
To make the number be integer, 1*2 = 2
1.5*2 = 3
.
∵The empirical formula of the oxide is X3O2
2007-04-19 10:39:54 補充:
SOrry計mole ratio 果陣計錯左By mole ratioThe relative ratio of the oxygen atom is 0.08/0.06 = 1.3333The relative ratio of the metal X atom is 0.06/0.06 = 1To make the number be integer, 1.333*3 = 41*3 = 3∵The empirical formula of the oxide is X3O4