a.\(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)

0,2                                     0,3   ( mol )

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

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

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

0,6  >  0,3                              ( mol )

          0,3                0,3            ( mol )

\(m_{Cu}=0,3.64=19,2\left(g\right)\)

c.\(2H_2+O_2\rightarrow\left(t^o\right)2H_2O\)

  0,3        0,15                     ( mol )

\(V_{kk}=V_{O_2}.5=\left(0,15.22,4\right).5=16,8\left(l\right)\)

a, PT: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)

Theo PT: \(\left\{{}\begin{matrix}n_{AlCl_3}=n_{Al}=0,2\left(mol\right)\\n_{H_2}=\dfrac{3}{2}n_{Al}=0,3\left(mol\right)\end{matrix}\right.\)

a, Ta có: \(m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)

b, Ta có: \(V_{H_2}=0,3.22,4=6,72\left(l\right)\)

Bạn tham khảo nhé!

PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)

Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}n_{AlCl_3}=0,2mol\\n_{H_2}=0,3mol\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{AlCl_3}=0,2\cdot133,5=26,7\left(g\right)\\V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\end{matrix}\right.\)

a) pt: 2Al + 6HCl \(\rightarrow\) 2AlCl₃ + 3H₂

nAl = \(\dfrac{5,4}{27}=0,2mol\)

Theo pt: nH₂ = \(\dfrac{3}{2}nAl=0,3mol\)

=> VH₂ = 0,3.22,4 = 6,72lit

c) nHCl = 3nAl = 0,6mol

=> mHCl = 21,9g

=> C% = \(\dfrac{21,9}{200}.100\%=10,95\%\)

d) Bảo toàn khối lượng

mdung dich muối = mAl + mHCl - mH2

= 5,4 + 200 - 0,3.2 = 204,8g

Theo pt:nAlCl_3 ⁼ nAl = 0,2mol

=> mAlCl₃ = 0,2.133,5 = 26,7g

=> C%dd muối = \(\dfrac{26,7}{204,8}.100\%=13,03\%\)

e) H₂ + CuO \(\xrightarrow[]{t^o}\) Cu + H₂O

nCu = nH₂ = 0,3mol

=> mCu = 0,3.64 = 19,2g

ở ngoài ko thấy chỗ C% nên ấn vào câu hỏi mới ra nha

2Al+6HCl->2AlCl3+3H2

0,4--------------------------0,6

n Al=0,4 mol

=>VH2=0,6.22,4=13,44l

H2+HgO-tO>Hg+H2O

0,6--------------0,6

=>m Hg=0,6.201=120,6g

\(n_{Al}=\dfrac{10,8}{27}=0,4\left(mol\right)\\ PTHH:2Al+6HCl\rightarrow2AlCl_3+3H_2\)

                0,4                                    0,6

\(\rightarrow V_{H_2}=0,6.22,4=13,44\left(l\right)\\ PTHH:HgO+H_2\underrightarrow{t^o}Hg+H_2P\)

                           0,6    0,6

\(\rightarrow m_{Hg}=0,6.201=120,6\left(g\right)\)

nAl = 10,8 : 27 = 0,4  (mol) 
pthh : 2Al + 6HCl ---> 2AlCl3 + 3H2
          0,4---------------------------->0,6 (mol) 
=> VH2 = 0,6 . 22,4 = 13,44 (L)
pthh : HgO + H2 -t--> Hg + H2O 
          0,6<---0,6------>0,6-->0,6 (MOL) 
=> mHg = 0,6 . 201 =120,6 (G) 

2Al+6HCl-->2AlCl₃+3H₂

0,3----0,9---------0,3------0,45

=>n _Al=8,1\17=0,3 mol

=>V_H2=0,45.22,4=10,08l

=>m _HCl=0,9.26,5=32,85g

=>m_AlCl3=0,3.133,5=40,05g

C2 :Bảo Toàn khối lượng 

=>m _AlCl3=40,05g

B nha

a. 2Al + 6HCl -> 2AlCl₃ + 3H₂

b. n_Al = \(\dfrac{8.1}{27}=0,3\left(mol\right)\)=> \(n_{H_2}=\dfrac{3}{2}.0,3=0,45\left(mol\right)\)

\(V_{H_2}=0,45.22,4=10,08\left(mol\right)\)

c. \(n_{HCl}=3n_{Al}=3.0,3=0,9\left(mol\right)=>m_{HCl}=0,9.36,5=32,85\left(g\right)\)

Vậy m = 32,85

B là khí hi đro nha

\(n_{Al}=\dfrac{13.5}{27}=0.5\left(mol\right)\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

\(0.5........................0.5......0.75\)

\(a.\)

\(m_{AlCl_3}=0.5\cdot133.5=66.75\left(g\right)\)

\(b.\)

\(V_{H_2}=0.75\cdot22.4=16.8\left(l\right)\)

\(c.\)

\(n_{FeO}=\dfrac{64.8}{72}=0.9\left(mol\right)\)

\(FeO+H_2\underrightarrow{t^0}Fe+H_2O\)

\(0.75.....0.75...0.75\)

\(\Rightarrow FeOdư\)

\(m_{Fe}=0.75\cdot56=42\left(g\right)\)

a)mol Al= 0.5

pthh:     2Al + 6HCl -----> 2AlCl\(_3\) + 3H\(_2\)

0.5mol Al= 0,5 mol AlCl\(_3\) ---> m\(_{AlCl}\)\(_3\)=0,5*(27+35,5*3)=66.75

c) pthh:   FeO + H\(_2\) --\(^{to}\)-> Fe + H\(_2\)O

mol\(_{FeO}\)=64,8/(56+16)=0,9

mol\(_{H_{ }2}\)=0.75

mol\(h2\)<mol\(_{FeO}\)---->H2 hết,   FeO dư

m\(_{Fe}\)=0,75*56=42(g)

Bài 1 :

a. \(n_{Al}=\dfrac{2.7}{27}=0,1\left(mol\right)\)

PTHH : 2Al + 6HCl -> 2AlCl₃ + 3H₂

            0,1        0,3                     0,15

b. \(V_{H_2}=0,15.22,4=3,36\left(l\right)\)

c. \(m_{HCl}=0,3.36,5=10,95\left(g\right)\)

Bài 2 :

a. \(n_{Na}=\dfrac{2.3}{23}=0,1\left(mol\right)\)

PTHH : 2Na + 2H₂O -> 2NaOH + H₂

             0,1                    0,1          0,05

b. \(V_{H_2}=0,05.22,4=1,12\left(l\right)\)    

c. \(m_{NaOH}=0,1.40=4\left(g\right)\)