Ta có: \(n_{CO_2}=\dfrac{11}{44}=0,25\left(mol\right)\)

\(\Rightarrow V_{CO_2}=0,25.22,4=5,6\left(l\right)\)

Bạn tham khảo nhé!

Ta có: \(n_{CO_2}=\dfrac{11}{44}=0,25\left(mol\right)\)

\(\Rightarrow V_{CO_2}=0,25.22,4=5,6\left(lít\right)\)

Ta có: \(n_{CO_2}=\dfrac{11}{44}=0,25\left(mol\right)\)

\(\Rightarrow V_{CO_2}=0,25.22,4=5,6\left(lít\right)\)

Vậy không có đáp án thích hợp

4Fe+3O2-to>2Fe2O3

0,8-----0,6------0,4 mol

n Fe=\(\dfrac{44,8}{56}\)=0,8 mol

=>VO2=0,6.22,4=13,44l

=>m Fe2O3=0,4.160=64g

d) 2KMnO4-to>K2MnO4+MnO2+O2

        1,2---------------------------------0,6

=>m KMnO4=1,2.158=189,6g

nFe2O3 = 32/160 = 0,2 (mol)

PTHH: Fe2O3 + 3H2 -> (t°) 2Fe + 3H2O

Mol: 0,2 ---> 0,6 ---> 0,4

mFe = 0,4 . 56 = 22,4 (g)

VH2 = 0,6 . 24,79 = 14,874 (l)

Fe2O3+3H2-to>2Fe+3H2O

0,2-------------------0,4------0,6 mol

n Fe2O3=0,2 mol

=>m Fe=0,4.56=22,4g

=>m VH2=0,6.24,79=14,874l

\(a,n_{Fe}=\dfrac{16,8}{56}=0,3\left(mol\right)\\ 3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\\ b,n_{Fe_3O_4}=\dfrac{n_{Fe}}{3}=\dfrac{0,3}{3}=0,1\left(mol\right)\\ \Rightarrow m_{Fe_3O_4}=232.0,1=23,2\left(g\right)\\ n_{O_2}=\dfrac{2}{3}.n_{Fe}=\dfrac{2}{3}.0,3=0,2\left(mol\right)\\ \Rightarrow V_{O_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\)

.iron là sắt mà s cho S nx v?

\(n_{Fe_2O_3}=\dfrac{16}{160}=0,1mol\)

\(Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)

  0,1        0,3                                    ( mol )

\(V_{H_2}=0,3.22,4=6,72l\)

=> Chọn C

\(n_{CH_4}=\dfrac{2,4}{16}=0,15\left(mol\right)\)

\(\Rightarrow V_{CH_4}=0,15.22,4=3,36\left(lít\right)\)

Chọn C

3Fe+2O2-to>Fe3O4

0,06---0,04------0,02 mol

n Fe3O4=\(\dfrac{4,64}{232}\)=0,02 mol

=>m Fe=0,06.56=3,36g

=>VO2=0,04.22,4=0,896l

b)2KClO3-to>2KCl+3O2

    \(\dfrac{2}{75}\)------------------0,04 mol

=>m KClO3=\(\dfrac{2}{75}\).122,5=32,67g

\(n_{O_2}=\dfrac{3,7185}{24,79}=0,15\left(mol\right)\\ 3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\\ n_{Fe}=\dfrac{3}{2}.n_{O_2}=1,5.0,15=0,225\left(mol\right)\\ \Rightarrow m_{Fe}=0,225.56=12,6\left(g\right)\\ n_{Fe_3O_4}=\dfrac{n_{O_2}}{2}=\dfrac{0,15}{2}=0,075\left(mol\right)\\ \Rightarrow m_{Fe_3O_4}=232.0,075=17,4\left(g\right)\)

đkc đúng k bn :) ?