\(n_{CuO}=\dfrac{9,6}{80}=0,12mol\)

\(CuO+H_2\rightarrow Cu+H_2O\)

0,12      0,12    0,12

a)\(m_{Cu}=0,12\cdot64=7,68g\)

b)\(V=0,12\cdot22,4=2,688l\)

em còn hai bài nữa ạ

\(n_{CuO}=\dfrac{m_{CuO}}{M_{CuO}}=\dfrac{9,6}{80}=0,12mol\)

\(CuO+H_2\rightarrow\left(t^o\right)Cu+H_2O\)

 0,12   0,12           0,12                 ( mol )

\(m_{Cu}=n_{Cu}.M_{Cu}=0,12.56=6,72g\)

\(V_{H_2}=n_{H_2}.22,4=0,12.22,4=2,688l\)

nCuO =  = 0,6 mol.

Phương trình hóa học của phản ứng khử CuO:

CuO + H2 → Cu + H2O.

nCu = 0,6mol.

mCu = 0,6 .64 = 38,4g.

Theo phương trình phản ứng trên:

nH2 = 0,6 mol

VH2 = 0,6 .22,4 = 13,44 lít.

nCuO = 48 : 80 = 0,6 (Mol) 
pthh : CuO + H2 -t--> Cu + H2O 
        0,6---->06------>0,6
=> mCu= 0,6 . 64 = 38,4 (G) 
=> VH2 = 0,6 .22,4 = 13,44 (L)

a, \(n_{CuO}=\dfrac{48}{80}=0,6\left(mol\right)\)

PTHH: CuO + H₂ --to--> Cu + H₂O

            0,6     0,6            0,6

\(\rightarrow\left\{{}\begin{matrix}m_{Cu}=0,6.64=38,4\left(g\right)\\V_{H_2}=0,6.22,4=13,44\left(l\right)\end{matrix}\right.\)

PTHH :  \(CuO+H_2\left(t^o\right)->Cu+H_2O\)  (1)

a)  \(n_{CuO}=\dfrac{m}{M}=\dfrac{48}{64+16}=0,6\left(mol\right)\)

Từ (1) ->  \(n_{Cu}=n_{CuO}=n_{H_2}=0,6\left(mol\right)\)

->  \(m_{Cu}=n.M=0,6.64=38,4\left(g\right)\)

     \(V_{H_2}=n.22,4=0,6.22,4=13,44\left(l\right)\)

1/ \(CuO+H_2-^{t^o}\rightarrow Cu+H_2O\)

\(n_{Cu}=n_{CuO}=\dfrac{48}{80}=0,6\left(mol\right)\)

=> \(m_{Cu}=0,6.64=38,4\left(g\right)\)

\(n_{H_2}=n_{CuO}=0,6\left(mol\right)\)

=> \(V_{H_2}=0,6.22,4=13,44\left(l\right)\)

2. \(2H_2+O_2-^{t^o}\rightarrow2H_2O\)

\(n_{H_2}=0,375;n_{O_2}=0,125\)

Lập tỉ lệ \(\dfrac{0,375}{2}>\dfrac{0,125}{1}\)

=> Sau phản ứng H2 dư, tính theo số mol O2

\(n_{H_2O}=2n_{O_2}=0,25\left(mol\right)\)

=> \(m_{H_2O}=0,25.18=4,5\left(g\right)\)

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

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

`n_[CuO]=[0,8]/80=0,01(mol)`

`H_2 + CuO` $\xrightarrow{t^o}$ `Cu + H_2 O`

`0,01`   `0,01`        `0,01`                    `(mol)`

`a)m_[Cu]=0,01.64=0,64(g)`

`b)V_[H_2]=0,01.22,4=0,224(l)`

`c)`

`Fe + 2HCl -> FeCl_2 + H_2`

`0,01`  `0,02`                       `0,01`       `(mol)`

`@m_[Fe]=0,01.56=0,56(g)`

`@m_[dd HCl]=[0,02.36,5]/20 . 100=3,65(g)`

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

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

 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)                  

Fe₂O₃+3H₂-to>2Fe+3H₂O

0,1-----0,3-------0,2-----0,3 mol

n Fe₂O₃ =0,1 mol

m Fe=0,2.56=11,2g

VH2=0,3.22,4=6,72l

#yT