a) \(n_{H_2SO_4}=\dfrac{11,76}{98}=0,12\left(mol\right)\)
PTHH: 2A + 3H2SO4 --> A2(SO4)3 + 3H2
0,08<--0,12------->0,04------>0,12
=> VH2(sinh ra) = 0,12.22,4 = 2,688 (l)
\(V_{H_2\left(thu.được\right)}=\dfrac{2,688.70}{100}=1,8816\left(l\right)\)
=> Số bình = \(\dfrac{1,8816.10^3}{50}\approx38\left(bình\right)\)
b) \(M_A=\dfrac{2,16}{0,08}=27\left(g/mol\right)\)
=> A là Al
c) dd sau pư chứa Al2(SO4)3
mAl2(SO4)3 = 0,04.342= 13,68 (g)