Question

AM NEVOIE URGENT!!!!!!!!!!!!!!!!!
Calculeazã masa fierului ce poate fi obþinut prin alumotermie din
23,2 g de Fe3O4 oi 23,76 g de aluminiu.

Answer 1

Răspuns:

3molii.......8moli......9moliiii

3Fe 304+8Ai->(t>2000°C) 4Ai203+9Fe

0.1moli......,0.88moli.......x moli...........

Nr moli=m/M=23.2/232=0.1 moli Fe 304

MFe 304=56×3+16×4=232 g/mol

Nr moli=m/M=23.76/27=0.88 moli

MAi=27 g/mol

M=4.95×56=277.2g Fe