Bài 1:
\(n_{KClO_3}=\dfrac{12,25}{122,5}=0,1\left(mol\right)\\ PTHH:2KClO_3\underrightarrow{t^o}2KCl+3O_2\\ \left(mol\right).....0,1\rightarrow....0,1.......0,15\\ a,m_{KCl}=0,1.74,5=7,45\left(g\right)\\ V_{O_2}=0,15.22,5=3,36\left(l\right)\)
CaCO3 bạn nhé
Bài 2:
\(n_{CaCO_3}=\dfrac{10}{100}=0,1\left(mol\right)\\ PTHH:CaCO_3\underrightarrow{t^o}CaO+CO_2\\ \left(mol\right).....0,1\rightarrow....0,1.....0,1\\ m_{CaO}=0,1.56=5,6\left(g\right)\\ V_{CO_2}=0,1.22,4=2,24\left(l\right)\)