2KNO3\(\rightarrow\)2KNO2 + O2
b;nO2=\(\dfrac{2,4}{32}=0,075\left(mol\right)\)
Theo PTHH ta có:
nKNO3=2nO2=0,15(mol)
mKNO3 ban đầu=0,15.101=15,15(g)
mKNO3 thực tế=15,15.\(\dfrac{85}{100}=12,8775\left(g\right)\)
c;
nKNO3=\(\dfrac{10,1}{101}=0,1\left(mol\right)\)
Theo PTHH ta có:
\(\dfrac{1}{2}\)nKNO3=nO2=0,05(mol)
mO2 ban đầu=32.0,05=1,6(g)
mO2 thu được=1,6\(\dfrac{85}{100}=1,36\left(g\right)\)