Răspuns :
Răspuns:
Al(OH)3 (hidroxid de aluminiu)
Explicație:
M Fe(OH)3 = 107 g/mol
M Al(OH)3 = 78 g/mol
M NaOH = 40 g/mol
107 g Fe(OH)3.............................48 g oxigen
100 g..............................................x = 100*48/107 = 44,9%
78 g Al(OH)3............................48 g oxigen
100 g.........................................y = 48*100/78 = 61,5%
100 g NaOH..............................16 g oxigen
40 g...............................................z = 40*16/100 = 6,4%