\(a) 2KClO_3 \xrightarrow{t^o,MnO_2} 2KCl +3 O_2\\ n_{O_2} = \dfrac{3}{2}n_{KClO_3} = \dfrac{3}{2}. \dfrac{9,8}{122,5} = 0,12(mol)\\ \Rightarrow V_{O_2} = 0,12.22,4 = 2,688(lít)\\ b) 2H_2O \xrightarrow{điện\ phân} 2H_2 + O_2\\ n_{O_2} = \dfrac{1}{2}n_{H_2O} = \dfrac{1}{2}. \dfrac{36.1000}{18} = 1000(mol)\\ \Rightarrow V_{O_2} = 1000.22,4 = 22400(lít)\)

\(â.\)

\(n_{KClO_3}=\dfrac{9.8}{122.5}=0.08\left(mol\right)\)

\(2KClO_3\underrightarrow{t^0}2KCl+3O_2\)

\(0.08........................0.12\)

\(V_{O_2}=0.12\cdot22.4=2.688\left(l\right)\)

\(b.\)

\(n_{H_2O}=\dfrac{36\cdot1000}{18}=2000\left(mol\right)\)

\(2H_2O\underrightarrow{t^0}2H_2+O_2\)

\(2000..................1000\)

\(V_{O_2}=1000\cdot22.4=22400\left(l\right)\)

a.\(n_{KClO_3}=\dfrac{m_{KClO_3}}{M_{KClO_3}}=\dfrac{12,25}{122,5}=0,1mol\)

\(2KClO_3\rightarrow\left(t^o\right)2KCl+3O_2\)

    2                       2           3       ( mol )

  0,1                                 0,15

\(V_{O_2}=n_{O_2}.22,4=0,15.22,4=3,36l\)

b.\(V_{kk}=V_{O_2}.5=3,36.5=16,8l\)

c.\(n_{Fe}=\dfrac{m_{Fe}}{M_{Fe}}=\dfrac{28}{56}=0,5mol\)

\(3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)

  3        2                   1         ( mol )

0,5   >   0,15                          ( mol )

0,225              0,15                 ( mol )

\(m_{Fe\left(du\right)}=n_{Fe\left(du\right)}.M_{Fe}=\left(0,5-0,225\right).56=15,4g\)

Cập nhật lại câu hỏi đi bạn :v

\(n_{KClO_3}=\dfrac{12,25}{122,5}=0,1mol\)

\(2KClO_3\rightarrow\left(t^o,MnO_2\right)2KCl+3O_2\)

    0,1                                   0,1     0,15   ( mol )

\(m_{KCl}=0,1.74,5=7,45g\)

\(V_{O_2}=0,15.22,4=3,36l\)

2KClO3-to>2KCl+3O2

0,1------------0,1-----0,15

n KClO3=\(\dfrac{12,25}{122,5}=0,1mol\)

=>m KCL=0,1.74,5=7,45g

=>VO2=0,15.22,4=3,36l

2KClO₃-to>2KCl+3O₂

0,3---------------------0,45 mol

n_KClO3= \(\dfrac{36,75}{122,5}\)=0,3 mol

=>V_O2=0,45.22,4=10,08l

=>D

\(n_{KClO_3}=\dfrac{36,75}{122,5}=0,3\left(mol\right)\\ 2KClO_3\rightarrow\left(t^o,xt\right)2KCl+3O_2\\ n_{O_2}=\dfrac{3}{2}.0,3=0,45\left(mol\right)\\ \Rightarrow V_{O_2\left(đktc\right)}=0,45.22,4=10,08\left(l\right)\\ \Rightarrow ChọnD\)

Xíu check in sân bay, chừ làm vài câu đã háy :P

\(a.2KClO_3-^{t^o}\rightarrow2KCl+3O_2\\ n_{O_2}=\dfrac{3}{2}n_{KClO_3}=0,6\left(mol\right)\\ \Rightarrow V_{O_2}=0,6.22,4=13,44\left(l\right)\\ n_{KCl}=n_{KClO_3}=0,4\left(mol\right)\\ \Rightarrow m_{KCl}=0,4.74,5=29,8\left(g\right)\)

a) \(2KClO_3\xrightarrow[MnO_2]{t^o}2KCl+3O_2\)

\(n_{KClO_3}=\dfrac{m}{M}=\dfrac{9,8}{122,5}=0,08\left(mol\right)\)

Theo PTHH, \(n_{O_2}=\dfrac{3}{2}n_{KClO_3}=\dfrac{3}{2}\cdot0,08=0,12\)(mol)

\(V_{O_2}=n\cdot22,4=0,12\cdot22,4=2,688\left(l\right)\)

b) \(2H_2O\overrightarrow{đp}2H_2+O_2\)

Đổi: \(36kg=36000g\)

\(n_{H_2O}=\dfrac{m}{M}=\dfrac{36000}{18}=2000\left(mol\right)\)

Theo PTHH, \(n_{O_2}=\dfrac{1}{2}n_{H_2O}=\dfrac{1}{2}\cdot2000=1000\left(mol\right)\)

\(V_{O_2}=n\cdot22,4=1000\cdot22,4=22400\left(l\right)\)

   Theo định luật bảo toàn khối lượng, ta có khối lượng khí oxi thu được là:

    m O 2  = 24,5 – 13,45 = 11,05(g)

   Khối lượng thực tế oxi thu được:  m O 2  = (11,05 x 80)/100 = 8,84 (g)

a) n KClO3=9,8/122,5=0,08(mol)

2KClO3--->2KCl+3O2

0,08----------------->0,12(mol)

V O2=0,12.22,4=2,688(l)

b)ông ngiệp là gì nhỉ ?

Mk viết nhầm nha!!!

ý b, Khi điện phân 36 kg \(H_2O\) trong công nghiệp

b, PTHH : \(2H_2O\rightarrow2H_2+O_2\)

\(n_{H_2O}=\frac{m_{H_2O}}{M_{H_2O}}=\frac{36000}{2+16}=2000\left(mol\right)\)

- Theo PTHH : \(n_{O_2}=\frac{1}{2}n_{H_2O}=\frac{1}{2}.2000=1000\left(mol\right)\)

-> \(V_{O_2}=n_{O_2}.22,4=1000.22,4=22400\left(l\right)\)

PTHH:

\(2KClO_3\rightarrow2KCl+3O_2\)

BTKL:

\(m_{KClO_3}=m_{KCl}+m_{O_2}\)

\(\Leftrightarrow m_{KCl}=m_{KClO_3}-m_{O_2}=24,5-9,6=14,9g\)