Question

pentru Al(OH)3 calculati
masa de aluminiu din 1000 g subst
masa (m) pentru 5 moli de subst

Answer 1

MAl(OH)3=27+3*16+3*1=78g/mol
78g Al(OH)3................27gAl
1000g..........................x
x=27*1000/78=346,15 gAl

1mol Al(OH)3.......................27g Al
5 moli..................................y
y=5*27=135 gAl