Question

calculeaza nr de moli si masa de sulf care reactioneaza cu 27 g aluminiu

Answer 1

27g    n moli

2Al   +   3S --> Al2S3

2x27       3

=> n = 27x3/2x27 = 1,5 moli S

A.S = 32 g/mol-atom (vezi Sist. Per.)

nr.moli = m/M, M = A.S

=> m = nr.moli x A.S = 1,5x32 = 48g