a) \(n_{KClO_3}=\frac{49}{122,5}=0,4\left(mol\right)\)
\(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
0,4________0,4_____0,6(mol)
\(a=0,6.22,4=13,44\left(l\right)\)
\(b=0,4.74,5=29,8\left(g\right)\)
b) \(n_{O2}=0,6\left(mol\right)\)
\(2H_2S+3O_2\underrightarrow{t^o}2SO_2+2H_2O\)
0,4______0,6____0,4____0,4(mol)
\(V_{SO2}=0,4.22,4=8,96\left(l\right)\)
Chúc bn học tốt
2KClO3-->2KCl+3O2
0,4--------0,4------0,6 mol
nKClO3=49\122,5=0,4mol
=>a=VO2=0,6.22,4=13,44 l
=b=mKCl=0,4.74,5=29,8 g
b)2H2S +3 O2 ----> 2SO2 + 2H2O.
-----------0,6 ----------0,4 mol
=>VSO2=0,4 .22,4=8,96 l
số mol KClO3 là
\(n_{KClO_3}=\frac{49}{\left(39+35,5+16.3\right)}=0,4\left(mol\right)\)
PTHH\(2KClO_3\rightarrow^t2KCl+3O_2\)
\(V_{_{ }a}=n.22,4=\left(0,4.\frac{3}{2}\right).22.4=1,5\left(l\right)\)
\(m_b=n.M=\left(0,4\right).\left(39+35.5\right)=29,8\left(g\right)\)
câu b mk ko hiểu cách tính nha!!!