a_) Theo đề bài ta có : nO2 = 4,4/22,4 = 0,2(mol)
PTHH :
\(2KClO3-^{t0}->2KCl+3O2\)
2/15mol...................................0,2mol
=> mKClO3 = 2/15.122,5 = 16,3(g)
b_) Theo đề bài ta có : nKClO3 = 61,25/122,5 = 0,5(mol)
PTHH :
\(2KClO3-^{t0}->2KCl+3O2\)
0,5mol..........................0,5mol...0,75mol
=> \(\left\{{}\begin{matrix}mKCl=0,5.74,5=37,25\left(g\right)\\VO2\left(đktc\right)=0,75.22,4=16,\left(l\right)\end{matrix}\right.\)