\(n_{O_2}=\dfrac{43.2}{32}=1.35\left(mol\right)\)
\(2KClO_3\underrightarrow{^{t^0}}2KCl+3O_2\)
\(0.9...........................1.35\)
\(H\%=\dfrac{0.9}{1}\cdot100\%=90\%\)
PT: \(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
______1_____________1,5 (mol)
⇒ mO2 (lí thuyết) = 1,5.32 = 48 (g)
Mà: mO2 (thực tế) = 43,2 (g)
\(\Rightarrow H\%=\dfrac{43,2}{48}.100\%=90\%\)
Bạn tham khảo nhé!
\(n_{O_2}\)=\(\dfrac{43,2}{32}=1,35\left(mol\right)\)
PTHH 2KClO3-----to--->2KCl +3O2
=>\(n_{O_2\left(lt\right)}=1.\dfrac{3}{2}=1,5\left(mol\right)\)
=>H%=\(\dfrac{1,35}{1,5}.100\%=90\%\)