-calculez moli gaz
1at..........760mm
x...............950-----.> p= 950/760at
pV=nRT
950/760 X100l = nx0,082x(273+67)---> n=4,48moli gaz,banuiesc H2
2Al + 3H2SO4----> Al2(SO4)3 + 3H2
2x27g...........................................3mol
m=................................................4,48mol
calculeaza m!!!