\(2Al+6HCl\to 2AlCl_3+3H_2\\ \Rightarrow \text{Số nguyên tử Al : Số phân tử }HCl=2:6=1:3 \)

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

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

Theo PT: \(n_{HCl}=2n_{H_2}=0,6\left(mol\right)\)

\(\Rightarrow m_{HCl}=0,6.36,5=21,9\left(g\right)\)

b, Theo PT: \(n_{Al}=\dfrac{2}{3}n_{H_2}=0,2\left(mol\right)\)

\(\Rightarrow m_{Al}=0,2.27=5,4\left(g\right)\)

nH₂=6.72/22,4=0,3(mol)
PTHH: 2Al +   6HCl --> 2AlCl₃ + 3H₂
bài ra:  0,2 <-- 0,6  <--   0,2   <-- 0,3  /mol
a) mHCl = 0,6.36,5=21,9(g)
b) mAl = 0.2.24 = 4,8(g)
 

\(PTHH:2Al+6HCl->2AlCl_3+3H_2\)

              0,2<--0,6<----------0,2<------0,3    (mol)

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

\(m_{HCl}=n\cdot M=0,6\cdot\left(1+35,5\right)=21,9\left(g\right)\)

\(m_{AlCl_3}=n\cdot M=0,2\cdot\left(27+35,5\cdot3\right)=26,7\left(g\right)\)

a, PT: 

Ta có: nAl=23nH2=0,2(mol)

⇒mAl=0,2.27=5,4(g)

a, PT: 

Ta có: nAl=23nH2=0,2(mol)

⇒mAl=0,2.27=5,4(g)

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

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

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 !!!

CHÚC BẠN HỌC TỐT!

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

ADĐLBTKL, ta có: \(m_{Al}+m_{HCl}=m_{AlCl3}+m_{H2}\)

\(\Rightarrow m_{Al}=m_{AlCl3}+m_{H2}-m_{HCl}\)

\(\Rightarrow m_{Al}=8,9+0,2-7,3=1,8\left(g\right)\)

Vậy............

nhớ ghi m nữa nhan.

al+hcl=alcl3+h2

al+7.3=8.9+0.2

al=(8.9+0.2)-7.3

al=1.8

a) \(PTHH:2Al+6HCl\xrightarrow[]{}2AlCl_3+3H_2\)

b) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

\(n_{Al}=\dfrac{0,15.2}{3}=0,1\left(mol\right)\)

\(m_{Al}=0,1.27=2,7\left(g\right)\)

c)\(n_{AlCl_3}=\dfrac{0,15.2}{3}=0,1\left(mol\right)\)

\(m_{AlCl_3}=0,1.133,5=13,35\left(g\right)\)

pls help me mng ơi!Tuần sau mnh thi mất r!T_T

a, 2Al + 6HCl -> 2AlCl₃ + 3H₂  (1)

b, n_H2=\(\dfrac{V}{22.4}\)=\(\dfrac{3,36}{22,4}\)=0,15 (mol)

Từ pt (1)

-> n_Al=\(\dfrac{2}{3}\).n_H2 = \(\dfrac{2}{3}\).0,15 = 0,1 (mol)

-> m_Al = n.M = 0,1 . 27 = 2,7 (g)

c, Từ pt (1)

-> n_AlCl3= \(\dfrac{2}{3}\).n_H2 = \(\dfrac{2}{3}\). 0,15 = 0,1 (mol)

-> m_AlCl3= n.M = 0,1 .133.5 = 13,35 (g)

\(n_{H_2}=\dfrac{3,36}{22,4}=0,15(mol)\\ a,2Al+6HCl\to 2AlCl_3+3H_2\\ \Rightarrow n_{Al}=n_{AlCl_3}=0,1(mol);n_{HCl}=0,3(mol)\\ b,m_{Al}=0,1.27=2,7(g);m_{HCl}=0,3.36,5=10,95(g)\\ m_{AlCl_3}=0,1.133,5=13,35(g)\\ c,n_{Al}=\dfrac{16,2}{27}=0,6(mol)\\ \Rightarrow n_{H_2}=1,5n_{Al}=0,9(mol)\\ \Rightarrow V_{H_2}=0,9.22,4=20,16(l)\)

a: \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

b: \(n_{H2}=\dfrac{3.36}{22.4}=0.15\left(mol\right)\)

\(\Leftrightarrow n_{Al}=0.1\left(mol\right)\)

\(m_{Al}=n_{Al}\cdot M_{Al}=0.1\cdot27=2.7\left(g\right)\)