2Zn + O2 \(\underrightarrow{t^o}\)2ZnO
nZn=\(\dfrac{13}{65}=0,2\left(mol\right)\)
nO2=\(\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Vì \(\dfrac{0,2}{2}< 0,2\) nên O2 dư 0,1(mol)
Theo PTHH ta có:
nZn=nZnO=0,2(mol)
mZnO=81.0,2=16,2(g)
2Zn + O2 -> 2ZnO
2 1 2 (mol)
0,4 0,2 0,4 (mol)
nZn = \(\dfrac{m}{M}\)=\(\dfrac{13}{65}\)= 0,2 (mol)
nO2 = \(\dfrac{V}{22,4}\) = \(\dfrac{4,48}{22,4}\) = 0,2 (mol)
SS:
Zn: \(\dfrac{0,2}{2}\) > \(\dfrac{0,2}{1}\): O2
=> Zn dư:
mZnO = n .M = 0,4 . 81 = 32,4 (g)