a) nAl=2,7/27=0,1(mol)

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

0,1_________0,3___0,1_____0,15(mol)

b) mHCl=0,3.36,5=10,95(g)

c) mAlCl3=0,1.133,5=13,35(g)

d) V(H2,đktc)=0,15.22,4=3,36(l)

a. PTHH: 2Al + 6HCl \(\rightarrow\) 2AlCl\(_3\) + 3H\(_2\)

b. \(n_{Al}=\dfrac{m_{Al}}{M_{Al}}=\dfrac{2,7}{27}=0,1\) (mol)

\(n_{HCl}=\dfrac{0,1.6}{2}=0,3\) (mol)

\(m_{HCl}=n_{HCl}.M_{HCl}=0,3.36,5=10,95\) (g)

c. \(n_{AlCl_3}=\dfrac{0,1.2}{2}=0,1\) (mol)

\(m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,1.133,5=13,35\) (g)

d. \(n_{H_2}=\dfrac{0,1.2}{3}=0,15\) (mol)

\(V_{H_2}=n_{H_2}.22,4=0,15.22,4=3,36\) (l)

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

                \(2mol\)   \(6mol\)       \(2mol\)       \(3mol\)

                \(0,27\)      \(x\)             \(y\)             \(z\)

b) ta có: \(n_{Al}=\dfrac{m_{Al}}{M_{Al}}=\dfrac{7,3}{27}=0,27\left(mol\right)\)

theo PT: \(n_{Al}=n_{AlCl_3}=0,27\left(mol\right)\)

\(\Rightarrow m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,27.133,5=36,045\left(g\right)\)

c) ta có: \(n_{H_2}=\dfrac{m_{H_2}}{M_{H_2}}=\) \(\dfrac{0,27.3}{2}=0,405\left(mol\right)\)

\(\Rightarrow V_{H_2\left(đktc\right)}=n_{H_2}.22,4=0,405.22,4=9,072\left(l\right)\)

xin lỗi bạn vừa nãy nhìn nhầm xíu :v

mình làm lại này:

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

theo PT:   \(2mol\)   \(6mol\)      \(2mol\)        \(3mol\)

                 \(x\)          \(0,2\)         \(y\)               \(z\)

b) \(n_{HCl}=\dfrac{m_{HCl}}{M_{HCl}}=\dfrac{7,3}{36,5}=0,2\left(mol\right)\)

\(\Rightarrow n_{AlCl_3}=\dfrac{0,2.2}{6}=0,06\left(mol\right)\)

\(\Rightarrow m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,06.133,5=8,01\left(g\right)\)

c) \(n_{H_2}=\dfrac{0,2.3}{6}=0,1\left(mol\right)\)

\(\Rightarrow V_{H_2}=n_{H_2}.22,4=0,1.22,4=2,24\left(l\right)\)

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

PTHH:

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

0,2                      0,2          0,3 

\(V_{H_2}=n.22,4=6,72\left(l\right)\)

\(m_{AlCl_3}=n.M=0,2.133,5=26,7\left(g\right)\)

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

b) \(n_{Al}=\dfrac{m}{M}=\dfrac{5,4}{27}=0,2\left(mol\right)\) ;    \(n_{HCl}=\dfrac{m}{M}=\dfrac{18,25}{36,5}=0,5\left(mol\right)\)

 \(2Al\)    \(+\)   \(6HCl\)    →    \(2AlCl_3\)  \(+\)  \(3H_2\)

Tỉ lệ:   \(\dfrac{0,2}{2}>\dfrac{0,5}{6}\)                                          ⇒  Al dư, tính theo HCl

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

           \(0,5\)    →   \(\dfrac{1}{6}\)    →   \(0,25\)       ( mol )

\(V_{H_2}=n.22,4=0,25.22,4=5,6\left(l\right)\)

c) \(m_{AlCl_3}=n.M=\dfrac{1}{6}.\left(27+35,5.3\right)=22,25\left(g\right)\)

Tính theo Phương trình hóa học ấy :D 

a) 2Al + 6HCl --> 2AlCl₃ + 3H₂

b) \(n_{H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

PTHH: 2Al + 6HCl --> 2AlCl₃ + 3H₂

_____0,2<---0,6<-----0,2<-----0,3

=> m_Al = 0,2.27 = 5,4 (g)

c) m_HCl = 0,6.36,5 = 21,9(g)

d) m_AlCl3 = 0,2.133,5 = 26,7 (g)

N_{h2 = 6,72 : 22,4 = 0,3(mol)}

    2Al + 6HCl -> 2AlCl₃ + 3H₂

Pt :   2        6           2             3(mol)       

Đb : 0,2           0,6       0,2         0,3   (mol)              

Theo PTHH 3mol H₂ = 2 mol Al

                    0,3mol Al = 0,2 mol H₂

M_Al = n*M = 0,3 * 27 = 8,1 ( g)

MHCl = n*M= 0,6 * 36,5 = 21,9 (g)

M_AlCl3= n*M= 0,2*133,5=26,7(g)

Nếu đúng thì tích cho mik cái nha :D                                 

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

\(n_{Al}=\dfrac{m_{Al}}{M_{Al}}=\dfrac{54}{27}=2\left(mol\right)\)

Theo PTHH: \(n_{H_2}=\dfrac{2.3}{2}=3\left(mol\right)\)

\(\Rightarrow V_{H_2}=n_{H_2}.22,4=3.22,4=67,2l\)

b) \(2H_2+O_2\rightarrow2H_2O\)

\(n_{O_2}=\dfrac{m_{O_2}}{M_{O_2}}=\dfrac{30}{32}=0,94\left(mol\right)\)

Theo PTHH: \(n_{H_2O}=\dfrac{0,94.2}{1}=1,88\left(mol\right)\)

\(\Rightarrow m_{H_2O}=n_{H_2O}.M_{H_2O}=1,88.18=33,84\left(g\right)\)

a)

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

PTHH: 2Al + 6HCl --> 2AlCl₃ + 3H₂

            0,2----------->0,2----->0,3

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

b) \(m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)

c)

PTHH: Zn + H₂SO₄ --> ZnSO₄ + H₂

                      0,3<----------------0,3

=> \(m_{H_2SO_4}=0,3.98=29,4\left(g\right)\)

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

PTHH:

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

0,2--------------->0,2------->0,3

\(V_{H_2}=0,3.22,4=6,72\left(l\right)\\ b,m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\)

c, PTHH:

\(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)

           0,2<------------------0,2

\(m_{H_2SO_4}=0,2.98=19,6\left(g\right)\)

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

\(n_{Al}=\dfrac{2,7}{27}=0,1(mol)\\ PTHH:2Al+6HCl\to 2AlCl_3+3H_2\\ a,n_{HCl}=3n_{Al}=0,3(mol)\\ \Rightarrow m_{HCl}=0,3.36,5=10,95(g)\\ b,n_{AlCl_3}=n_{Al}=0,1(mol)\\ \Rightarrow m_{AlCl_3}=0,1.133,5=13,35(g)\)

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

b)

\(CM=\dfrac{n}{v}\Leftrightarrow n=v.CM=1,5.0,6=0,9molHCl\)

\(0,9molHCl\rightarrow\dfrac{0,9.2}{6}=0,3molAl\)

m=n.M=0,3.27=8,1g

Trả lời giúp em với plsss🥺

a) PTHH : 2Al + 6HCl -------------->  2AlCl3 + 3H2

b ) b. Tính khối lượng kim loại Al cần dùng..

\(n_{HCl}=1,5.0,6=0,9\left(mol\right)\)

Theo PT : n_Al = \(\dfrac{1}{3}n_{HCl}\)=0,3(mol)

=> m _Al= 0,3.27 = 8,1(g)

Chúc em học tốt !!!