a. \(n_{H_2}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)
PTHH : Fe2O3 + 3H2 -> 2Fe + 3H2O
0,5 1,5 1
\(m_{Fe_2O_3}=0,5.160=80\left(g\right)\)
b. \(m_{Fe}=1.56=56\left(g\right)\)
nH2 = 9.10^23/6.10^23 = 1,5 (mol)
PTHH: Fe2O3 + 3H2 -> (t°) 2Fe + 3H2O
Mol: 0,5 <--- 1,5 ---> 1
mFe2O3 = 0,5 . 160 = 80 (g)
mFe = 1 . 56 = 56 (g)
Fe2O3+3H2-to>2Fe+3H2O
0,5-------1,5---------1 mol
n H2=\(\dfrac{9,10^{23}}{6.10^{23}}\)=1,5 mol
=>m Fe2O3=0,5.160=80g
=>m Fe=1.56=56g