Răspunsuri

2014-11-06T20:33:13+02:00
2Al+3 H2so4 ------Al2(SO4)3

MAl2(SO4)3= 294 este masa moleculara a sulfurii de aluminiu
M Al= 27

2.27 g Al...................294 g Al2(SO4)3
420 g Al.......................X
X=420.294/2.27=2286,66g sulfura de Al