Răspuns:
Al(OH)3
raport atomic: Al:O:H=1:3:3
roaport de masa Al:O:H=27:48:3=9:16:1
MAl(OH)3=27+3×16+3×1=78g/mol
78g Al(OH)3.........................................27gAl..........48gO...............3gH
100gAl(OH)3.....................................xgAl...................xgO..................zgH
x=100×27/78= calculeaza
y=100×48/78=calculeaza
z=100×3/78= calculeaza
Explicație: