Question

Calculeaza masa de sulf necesara pentru a reactiona cu 10,8 g aluminiu . Ce masa de sulfura de aluminiu rezulta din reactie?

Answer 1

2Al + 3S = Al2S3

MAl=27g/mol

MS=32g/mol

MAl2S3=2AAl+3AS=2*27+3*32=150g/mol

2*27g Al........3*32g S
10,8g Al...............xg S

x=3*32*10,8/2*27= Calculeaza !!

2*27g Al.......................150g Al2S3
10,8g Al...........................xg

x=150*10,8/2*27=Calculeaza !!!