PTHH: \(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)

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

\(\Rightarrow\left\{{}\begin{matrix}n_{HCl}=0,3\left(mol\right)\\n_{FeCl_2}=n_{Fe}=0,15\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{HCl}=0,3\cdot36,5=10,95\left(g\right)\\m_{Fe}=0,15\cdot56=8,4\left(g\right)\\m_{FeCl_2}=0,15\cdot127=19,05\left(g\right)\end{matrix}\right.\) 

PTHH: 

Ta có: 

a) nFe=0,1(mol); nHCl=0,4(mol)

PTHH: Fe + 2 HCl -> FeCl2 + H2

Ta có: 0,1/1 < 0,4/2

=> Fe hết, HCl dư, tish theo nFe.

b) nH2=nFeCl2=Fe=0,1(mol)

=> V(H2,đktc)=0,1.22,4=2,24(l)

c) mFeCl2=127.0,1=12,7(g)

a) nFe=0,1(mol); nHCl=0,4(mol) PTHH: Fe + 2 HCl -> FeCl2 + H2 Ta có: 0,1/1 < 0,4/2 => Fe hết, HCl dư, tish theo nFe. b) nH2=nFeCl2=Fe=0,1(mol) => V(H2,đktc)=0,1.22,4=2,24(l) c) mFeCl2=127.0,1=12,7(g)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(n_{Fe}=0,1\left(mol\right)\)

a, \(m_{FeCl_2}=0,1.\left(56+35,5.2\right)=12,7\left(g\right)\)

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

giúp e với ạ

\(n_{Fe}=\dfrac{11.2}{56}=0.2\left(mol\right)\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(0.2......0.4...........0.2.........0.2\)

\(V_{H_2}=0.2\cdot22.4=4.48\left(l\right)\)

\(m_{HCl}=0.4\cdot36.5=14.6\left(g\right)\)

\(BTKL:\)

\(m_{HCl}=m_{FeCl_2}+m_{H_2}-m_{Fe}=0.2\cdot127+0.2\cdot2-11.2=14.6\left(g\right)\)

\(a) Fe + 2HCl \to FeCl_2 + H_2\\ b) n_{H_2} = n_{Fe} = \dfrac{11,2}{56} = 0,2(mol)\\ \Rightarrow V_{H_2} = 0,2.22,4 = 4,48(lít)\\ c)C_1 : n_{HCl} = 2n_{Fe} = 0,4(mol) \Rightarrow m_{HCl} = 0,4.36,5 = 14,6(gam)\\ C_2 : \text{Bảo toàn khối lượng : }\\ m_{Fe} + m_{HCl} = m_{FeCl_2} + m_{H_2}\\ \Rightarrow m_{HCl} = 0,2.127 + 0,2.2 - 11,2 = 14,6(gam) \)

\(n_{Fe}=\dfrac{m}{M}=\dfrac{28}{56}=0,5\left(mol\right)\\ PTHH:Fe+2HCl->FeCl_2+H_2\)

ti le        1      :    2       :      1      :    1

n(mol)     0,5-->1--------->0,5------>0,5

\(m_{FeCl_2}=n\cdot M=0,5\cdot\left(56+35,5\cdot2\right)=63,5\left(g\right)\\ V_{H_2\left(dktc\right)}=n\cdot22,4=0,5\cdot22,4=11,2\left(l\right)\)

a.b.

\(n_{Fe}=\dfrac{2,8}{56}=0,05mol\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

0,05     0,1                        0,05    ( mol )

\(V_{H_2}=0,05.22,4=1,12l\)

\(m_{HCl}=0,1.36,5=3,65g\)

c.

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

             0,05           0,05           ( mol )

\(m_{Cu}=0,05.64=3,2g\)

a. PTHH : Fe + HCl -> FeCl₂ + H₂

b) \(n_{Fe}=\dfrac{28}{56}=0,5\left(mol\right)\)

\(n_{FeCl_2}=\dfrac{0,5}{2}=0,25\left(mol\right)\\ m_{FeCl_2}=0,25.127=31,75\left(g\right)\)

c) \(n_{H_2}=\dfrac{0,5}{1}=0,5\left(mol\right)\\ V_{H_2}=0,5.22,4=11,2\left(l\right)\)

Mà thể tích tối đa là 10 l -> quả bóng k chứa được hết lượng H2 thoát ra ngoài

Fe+2HCl->FeCl₂+H₂

0,5------------0,5-----0,5 

=>n _Fe=28\56=0,5 mol

=>m _FeCl2=0,5.127=63,5g

=>V_H2=0,5.22,4=11,2l

bóng 10l ko chứa hết đc nhé thừa 1,2l

\(n_{Fe}=\dfrac{28}{56}=0,5mol\)

a, PTHH : \(Fe + 2HCl-> FECl_2+ H_2↑\)

                 0,5                     0,5            0,5        (mol)

b/. Theo phương trình, ta có:

\(n_{FeCl_2}=n_{Fe}=0,5 mol\)

\(m_{FeCl_2}=0,5.127=63,5g\)

c, Thông cảm không biết làm

\(a,PTHH\left(1\right):Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)

\(b,n_{Fe}=\dfrac{m}{M}=\dfrac{28}{56}=0,5\left(mol\right)\\ Theo.PTHH\left(1\right):n_{FeCl_2}=n_{Fe}=0,5\left(mol\right)\\ m_{FeCl_2}=n.M=0,5.91,5=45,75\left(g\right)\)

\(c,PTHH\left(2\right):2Mg+O_2\underrightarrow{t^o}2MgO\\ n_{Mg}=\dfrac{m}{M}=\dfrac{4,8}{24}=0,2\left(mol\right)\\ Theo.PTHH\left(2\right):n_{O_2}=2.n_{Mg}=0,2.2=0,4\left(mol\right)\\ V_{O_2\left(đktc\right)}=n.22,4=0,4.22,4=8,96\left(l\right)\)

(c lỗi đề à có oxi chứ ko có hidro nên mik thay bằng oxi nha)