\(1.m_{CaCO_3}=400.85\%=340\left(g\right)\\ \rightarrow n_{CaCO_3}=\frac{340}{100}=3,4\left(mol\right)\\ PTHH:CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\uparrow\\ V_{CO_2}=3,4.22,4=76,16\left(l\right)\\ m_{HCl}=3,4.2.36,5=248,2\left(g\right)\\ m_{CaCl_2}=3,4.111=377,4\left(g\right)\)

\(2.\\ PTHH:C+O_2\underrightarrow{t^o}CO_2\\ PTHH:S+O_2\underrightarrow{t^o}SO_2\\ n_{SO_2}=\frac{4,48}{22,4}=0,2\left(mol\right)\\ \rightarrow m_S=0,2.32=6,4\left(g\right)\\ m_C=\sum_m-m_S=10-6,4=3,6\left(g\right)\\ \%_C=\frac{3,6}{10}.100=36\left(\%\right)\\ n_C=\frac{3,6}{12}=0,3\left(mol\right)\\ \sum n_{O_2}=0,3+0,2=0,5\left(mol\right)\\ \rightarrow V_{O_2}=0,5.22,4=11,2\left(l\right)\\ \rightarrow V_{KK}=5.11,2=56\left(l\right)\\ V_{CO_2}=0,3.22,4=6,72\left(l\right)\)

\(3.\\ n_{CaCO_3}=\frac{200}{100}=2\left(mol\right)\\ PTHH:C+O_2\underrightarrow{t^o}CO_2\\ PTHH:CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\\ Theo.pt:n_{CaCO_3}=n_{CO_2}=n_C=2\left(mol\right)\\ \rightarrow m_C=2.12=24\left(g\right)\\ \%_C=\frac{24}{80}.100\%=30\left(\%\right)\\ V_{CO_2}=22,4.2=44,8\left(l\right)\)

\(4.\\ 0,5m^3=500l\\ V_{CH_4}=500-500.2\%=490\left(l\right)\\ PTHH:CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\\ n_{CH_4}=\frac{490}{22,4}=21,875\left(mol\right)\\ V_{O_2}=22,4.\left(21,875.2\right)=980\left(l\right)=0,98\left(m^3\right)\)

a.Ta có: n_HCl=1.\(\frac{200}{1000}\)=0,2(mol)

Ta có phương trình  2Al       +      6HCl    ----->     2AlCl₃     +     3H₂ (1)

Theo phương trình:  2 mol           6 mol                                         3 mol

Theo đề:                   x mol           0,2 mol                                      0,1 mol

=> V_{\(H_2\)}=0,1.22,4=2,24(l)

b. Từ pt (1), ta có: 

m_Al=x.27=\(\frac{0,2.2}{6}\).27=1,8(g)

c.Từ pt (1), ta có: m_HCl=0,2. (1+35,5)=7,3(g)

mdd=\(\frac{200}{1000}.22,4.18=80,64\left(g\right)\)

=>C_%=\(\frac{7,3}{80,64}.100\%=9,1\%\)

Ungr hộ nha!

Ta có: \(n_{H_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

a, PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

_____0,05__0,1____________0,05 (mol)

b, m_Fe = 0,05.56 = 2,8 (g)

c, m_HCl = 0,1.36,5 = 3,65 (g)

\(\Rightarrow m_{ddHCl}=\dfrac{3,65}{10\%}=36,5\left(g\right)\)

Bạn tham khảo nhé!

\(n_{H_2}=\dfrac{1.12}{22.4}=0.05\left(mol\right)\)

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

\(0.05......0.1...................0.05\)

\(m_{Fe}=0.05\cdot56=2.8\left(g\right)\)

\(m_{dd_{HCl}}=\dfrac{0.1\cdot36.5\cdot100}{10}=36.5\left(g\right)\)

\(n_{H_2}=\dfrac{13,44}{22,4}=0,6mol\)

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

0,6       1,2           0,6        0,6    ( mol )

\(m_{Fe}=0,6.56=33,6g\)

\(m_{FeCl_2}=0,6.127=76,2g\)

\(C_{M_{HCl}}=\dfrac{1,2}{0,6}=2M\)

`Fe + 2HCl -> FeCl_2 + H_2↑`

`0,3`    `0,6`         `0,3`       `0,3`     `(mol)`

`n_[H_2] = [ 6,72 ] / [ 22,4 ] = 0,3 (mol)`

  `-> m_[Fe] = 0,3 . 56 = 16,8 (g)`

  `-> m_[FeCl_2] = 0,3 . 127 = 38,1 (g)`

`b) C_[M_[HCl]] = [ 0,6 ] / [ 0,3 ] = 2 (M)`

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

PTHH: Fe + 2HCl ---> FeCl₂ + H₂ 

          0,3<---0,6<------0,3<-----0,3

=> \(\left\{{}\begin{matrix}m_{Fe}=0,3.56=16,8\left(g\right)\\m_{FeCl_2}=127.0,3=38,1\left(g\right)\\C_{M\left(HCl\right)}=\dfrac{0,6}{0,3}=2M\end{matrix}\right.\)

1.1. Al + NaOH + H2O ==> NaAlO2 + 3/2H2

nH2(1)=3,36/22,4=0.15(mol)

=> nAl(1)= nH2(1):3/2= 0.15:3/2= 0.1(mol)

2.Mg + 2HCl ==> MgCl2 + H2

3.2Al + 6HCl ==> 2AlCl3 + 3H2

4.Fe + 2HCl ==> FeCl2 + H2

=> \(n_{H_2\left(2,3,4\right)}=\) 10.08/22.4= 0.45(mol)

=> nH2(3)=0.1*3/2=0.15(mol)

MgCl2 + 2NaOH ==> Mg(OH)2 + 2NaCl

AlCl3 + 3NaOH ==> Al(OH)3 + 3NaCl

FeCl2 + 2NaOH ==> Fe(OH)2 + 2NaCl

Theo gt ta có: $n_{Al}=0,2(mol)$

$2Al+6HCl\rightarrow 2AlCl_3+3H_2$

a, Ta có: $n_{H_2}=0,3(mol)\Rightarrow V_{H_2}=6,72(l)$

b, Ta có: $n_{HCl}=0,6(mol)\Rightarrow \%C_{HCl}=10,95\%$

c, Sau phản ứng dung dịch chứa 0,2 mol AlCl3

Suy ra $\%C_{AlCl_3}=13,03\%$