Question

60 g dintr-un element cu z=13 ( Aluminiu ) reactioneaza cu o solutie de h2so4 . Calculati masa H2 si volum H2 .

Answer 1

MAl = 27g/mol

n=m/M=60/27=2,222 moli Al

2Al + 3H2SO4 => Al2(SO4)3 + 3H2

2 moli Al.................3*2g H2
2,222 moli Al ........... X=6,666g H2

2 moli Al..........3*22,4L H2
2,222 moli Al. ........x=74,6592 L H2