N_{H2^{=\(\dfrac{5.6}{22.4}\)}}=0,25(mol)

a) Fe_2^O3 +3 H_{2 ^---}> 2Fe +3 H_{2^{O (1)}}

^{Fe +2HCl---> FeCl₂ +H₂ (2)}

_{^{b)Từ pứ (2) --> N}Fe^=NH2 ^{= 0,25 mol}}

_{^{=> m}Fe = 0,25 .56=14 (g)}

^{m_{Fe pứ 1} cũng chính là m_{Fe pứ 2}}

^{⇒m_{Fe pứ 1}= 14g và n_{Fe pứ 1= 0,25 mol}}

^{_{vậy y= 14g}}

_{^{Từ pứ (1)⇒N}Fe2O3^{=\(\dfrac{1}{2}\)}}. N_{Fe^{= 0,25 .\(\dfrac{1}{2}\)=0.125 mol}}

⇒_{^{mFe2O3= 0,125 .160=20 g}}

_{^{Vậy x= 20g}}

a ) \(n_{Fe_2O_4}=\frac{23,2}{232}=0,1\) mol

\(Fe_3O_4+4H_2\underrightarrow{t^0}3Fe+4H_2O\)

0,1 -> 0,4 -> 0,3

\(\Rightarrow n_{H_2}=4n_{Fe_3O_4}=0,4\) mol \(\Rightarrow V_{H_2}=0,4.22,4=8,96\) lít

b ) \(n_{Fe}=3n_{Fe_3O_4}=0,3\) mol \(\Rightarrow m_{Fe}=56.0,3=16,8\) gam.

\(n_{Fe_2O_3}=\dfrac{m}{M}=\dfrac{3,2}{160}=0,02mol\)

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

 0,02       0,06           0,04                    ( mol )

\(V_{H_2}=n.22,4=0,06.22,4=1,334l\)

\(m_{Fe}=n.M=0,04.56=2,24g\)

nFe2O3 = 3,2/160 = 0,02 (mol)

PTHH: Fe2O3 + 3H2 -> (t°) 2Fe + 3H2O

Mol: 0,02 ---> 0,06 ---> 0,04

VH2 = 0,06 . 22,4 = 1,344 (l)

mFe = 0,04 . 56 = 2,24 (g)

nFe2O3 = 3,2:160=0,02 (mol)
a) PTHH : Fe2O3 +3H2 -t--> 2Fe +3H2O
             0,02----> 0,06------->0,04(mol)
b) VH2= 0,06.22,4=1,344(l)
c) mFe = 0,04 .56=2,24(g)                  

a, \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

b, \(n_{Fe}=\dfrac{24}{56}=\dfrac{3}{7}\left(mol\right)\)

Theo PT: \(n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=\dfrac{3}{14}\left(mol\right)\Rightarrow m_{Fe_2O_3}=\dfrac{3}{14}.160=\dfrac{240}{7}\left(g\right)\)

c, Theo PT: \(n_{H_2}=\dfrac{3}{2}n_{Fe}=\dfrac{9}{14}\left(mol\right)\Rightarrow V_{H_2}=\dfrac{9}{14}.22,4=14,4\left(l\right)\)

\(n_{Fe}=\dfrac{m}{M}=\dfrac{24}{56}\approx0,43\left(mol\right)\\ a.PTHH:Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)  

                     2             3         2          3

                   0,43      0,645   0,45     0,645

\(b.m_{Fe_2O_3}=n.M=0,43.\left(56.2+16.3\right)=68,8\left(g\right)\\ c.V_{H_2}=n.24,79=0,645.24,79=15,98955\left(l\right).\)

a)\(PTHH:Fe_3O_4+4H_2\xrightarrow[]{}3Fe+4H_2O\)

b)\(m_{Fe}=\dfrac{24}{56}=0,4\left(m\right)\)

\(PTHH:Fe_3O_4+4H_2\xrightarrow[]{}3Fe+4H_2O\)

tỉ lệ       :1              4           3         4

số mol  :0,13         0,53       0,4     0,53

\(m_{Fe_3O_4}=0,13.232=30,16\left(g\right)\)

c)\(V_{H_2}=0,53.22,4=11,872\left(l\right)\)

Ta có: \(n_{Fe_2O_3}=\dfrac{48}{160}=0,3\left(mol\right)\)

PT: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

_____0,3_____0,9___0,6____0,9 (mol)

a, \(m_{Fe}=0,6.56=33,6\left(g\right)\)

b, \(V_{H_2}=0,9.22,4=20,16\left(l\right)\)

c, PT: \(2H_2+O_2\underrightarrow{t^o}2H_2O\)

Theo PT: \(n_{O_2}=\dfrac{1}{2}n_{H_2O}=0,9\left(mol\right)\)

\(\Rightarrow V_{O_2}=0,9.22,4=20,16\left(l\right)\)

a, \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)

PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

Theo PT: \(n_{H_2}=n_{Zn}=0,2\left(mol\right)\Rightarrow V_{H_2}=0,2.22,4=4,48\left(l\right)\)

b, Phần này có lẽ đề cho Sắt (III) oxit bạn nhỉ?

Ta có: \(n_{Fe_2O_3}=\dfrac{16}{160}=0,1\left(mol\right)\)

PT: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

Xét tỉ lệ: \(\dfrac{0,1}{1}>\dfrac{0,2}{3}\), ta được Fe₂O₃ dư.

Theo PT: \(n_{Fe}=\dfrac{2}{3}n_{H_2}=\dfrac{2}{15}\left(mol\right)\Rightarrow m_{Fe}=\dfrac{2}{15}.56=\dfrac{112}{15}\left(g\right)\)

a, Ta có: \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)

PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

___0,1_________________0,1 (mol)

\(\Rightarrow V_{H_2}=0,1.22,4=2,24\left(l\right)\)

b, Ta có: \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

PT: \(2H_2+O_2\underrightarrow{t^o}2H_2O\)

Xét tỉ lệ: \(\dfrac{0,1}{2}< \dfrac{0,3}{1}\), ta được O₂ dư.

Theo PT: \(n_{H_2O}=n_{H_2}=0,1\left(mol\right)\)

\(\Rightarrow m_{H_2O}=0,1.18=1,8\left(g\right)\)

Bạn tham khảo nhé!

n_Fe = 5.6/56 = 0.1 (mol) 

Fe + 2HCl => FeCl₂ + H₂

0.1...............................0.1

V_H2 = 0.1 * 22.4 = 2.24 (l) 

n_O2 = 6.72/22.4 = 0.3 (mol) 

2H₂ + O₂ -t⁰-> 2H₂O

0.1.....0.05.........0.1

=> O₂ dư 

m_H2O = 0.1 * 18 = 1.8 (g)