\(GS:n_A=1\left(mol\right)\)

\(n_{N_2}=a\left(mol\right),n_{H_2}=b\left(mol\right)\)

\(\Leftrightarrow a+b=1\left(1\right)\)

\(M_A=0.35\cdot28=9.8\left(\dfrac{g}{mol}\right)\)

\(m_A=9.8\cdot1=9.8\left(g\right)\)

\(\Leftrightarrow28a+2b=9.8\left(2\right)\)

\(\left(1\right),\left(2\right):a=0.3,b=0.7\)

\(\%n_{N_2}=\dfrac{0.3}{1}\cdot100\%=30\%\)

\(\%n_{H_2}=70\%\)

\(\%m_{N_2}=\dfrac{0.3\cdot28}{9.6}\cdot100\%=87.5\%\)

\(\%m_{H_2}=12.5\%\)

\(\)

a) Gọi n N2 = a(mol) ; n H2 = b(mol)

Coi n A = 1(mol)

M A  = 0,35.28 = 9,8 (g/mol)

Ta có : 

a + b = 1

28a + 2b = 9,8.1

Suy ra a = 0,3 ; b = 0,7

%V N2 = 0,3/1 .100% = 30%

%V H2 = 0,7/1  .100% = 70%

b)

%m N2 = 0,3.28/9,8  . 100% = 85,71%
%m H2 = 100%- 85,71% = 14,29%

\(n_{Br_2}=\dfrac{5,6}{160}=0,035mol\)

\(n_{hh}=\dfrac{0,56}{22,4}=0,025mol\)

Gọi \(\left\{{}\begin{matrix}n_{C_2H_2}=x\\n_{C_2H_4}=y\end{matrix}\right.\)

\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

   x          2x                          ( mol )

\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

   y         y                            ( mol )

Ta có:

\(\left\{{}\begin{matrix}x+y=0,25\\2x+y=0,035\end{matrix}\right.\)  \(\Leftrightarrow\left\{{}\begin{matrix}x=0,01\\y=0,015\end{matrix}\right.\)

\(\%V_{C_2H_2}=\dfrac{0,01}{0,025}.100=40\%\)

\(\%V_{C_2H_4}=100\%-40\%=60\%\)

\(m_{C_2H_2Br_4}=0,01.346=3,46g\)

\(m_{C_2H_4Br_2}=0,015.188=2,82g\)

Gọi \(n_{H_2} = a(mol) ; n_{N_2} = b(mol)\)

Coi \(n_{hỗn\ hợp} = 1(mol)\)

Ta có :

\(n_{hỗn\ hợp} = a + b = 1(mol)\\ m_{hỗn\ hợp} = 2a + 28b = 21,5.1 = 21,5(gam)\\ \Rightarrow a = 0,25 ; b = 0,75\)

Vậy :

\(\%V_{H_2} = \dfrac{0,25}{1}.100\% = 25\%\\ \%V_{N_2} = 100\% - 25\% = 75\%\)

Ta có MX = 3,6.2 =7,2.

Áp dụng qui tắc đường chéo :

=> nH2 : nN2 = 4 : 1

Đặt n_H2 = 4 mol => n_N2 = 1 mol

N2 + 3H2 ---> 2NH3

x----->3x-------->2x

=> n_Y = 5 – 2x mol

Bảo toàn khối lượng :

m_X = m_Y = 4.2 + 1.28 = 36g

=> M_Y = 4.2 =  

=> x = 0,25 mol

Tính hiệu suất theo N2 => H = \(\dfrac{0,25}{1}\)= 25%