a) \(n_{N_2}=\dfrac{5,6}{28}=0,2\left(mol\right)\); \(n_{SO_2}=0,5\left(mol\right)\)

=> \(V=\left(0,2+0,5\right).22,4=15,68\left(l\right)\)

=> \(m=5,6+0,5.64=37,6\left(g\right)\)

=> \(\overline{M}_{hh}=\dfrac{37,6}{0,7}=53,71\left(g/mol\right)\)

b) \(n_{O_3}=\dfrac{4,8}{48}=0,1\left(mol\right);n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

=> V = (0,1+0,1).22,4 = 4,48 (l)

=> m = 4,8 + 0,1.44 = 9,2 (g)

=> \(\overline{M}_{hh}=\dfrac{9,2}{0,2}=46\left(g/mol\right)\)

a) Gọi số mol N₂, O₂ trong 6,72l khí A lần lượt là a, b

=> \(\left\{{}\begin{matrix}28a+32b=8,8\\a+b=\dfrac{6,72}{22,4}=0,3\end{matrix}\right.\)

=> \(\left\{{}\begin{matrix}a=0,2\left(mol\right)\\b=0,1\left(mol\right)\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%V_{N_2}=\dfrac{0,2}{0,3}.100\%=66,67\%\\\%V_{O_2}=\dfrac{0,1}{0,3}.100\%=33,33\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{N_2}=\dfrac{28.0,2}{8,8}.100\%=63,64\%\\\%m_{O_2}=\dfrac{32.0,1}{8,8}.100\%=36,36\%\end{matrix}\right.\)

b) 

\(n_A=0,3\left(mol\right)\)

\(\Rightarrow n_{CO_2}=0,3\left(mol\right)\)

\(\Rightarrow m_{CO_2}=0,3.44=13,2\left(g\right)\)

c) 2,2g A có thể tích là 1,68 lít

=> \(V_{H_2}=1,68\left(l\right)\)

mMg = 0,5.24 = 12 gam

V_SO2 = n.22,4 = 0,25.22,4 = 5,6 lít

nN₂ = \(\dfrac{16,8}{22,4}\)= 0,75 mol , nO₂ = \(\dfrac{5,6}{22,4}\)= 0,25 mol

=> m(N₂  + O₂ ) = 0,75.28 + 0,25.32 = 29 gam

a.

\(m_{Al}=0.5\cdot27=13.5\left(g\right)\)

\(m_{CO_2}=\dfrac{6.72}{22.4}\cdot44=13.2\left(g\right)\)

\(m_{N_2}=\dfrac{5.6}{22.4}\cdot28=7\left(g\right)\)

\(m_{CaCO_3}=0.25\cdot100=25\left(g\right)\)

b.

\(m_{hh}=\dfrac{3.36}{22.4}\cdot2+\dfrac{5.6}{22.4}\cdot28+0.2\cdot44=16.1\left(g\right)\)

\(V_{CO_2}=0,5.22,4=11,2\left(l\right)\)

\(A_{CO_2}=0,5.6.10^{23}=3.10^{23}\) (phân tử \(CO_2\) )

2.

\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

=> \(n_C=n_{CO_2}=0,1\left(mol\right)\) (1)

=> \(n_O=2nCO_2=0,1.2=0,2\left(mol\right)\) (*)

\(n_{H_2O}=\dfrac{3,6}{18}=0,2\left(mol\right)\)

=> \(n_H=2n_{H_2O}=0,2.2=0,4\left(mol\right)\) (2)

=> \(n_O=n_{H_2O}=0,2\left(mol\right)\) (**)

\(n_{O_2}=\dfrac{4,8}{22,4}=0,2\left(mol\right)\)

=> \(n_O=2n_{O_2}=2.0,2=0,4\left(mol\right)\) (3)

\(X+O_2\underrightarrow{t^o}CO_2+H_2O\)

Từ (1),(2),(3), (*), (**)  suy ra: \(n_C:n_H:n_O=0,1:0,4:0\)

=> Công thức tổng quát của X là \(C_xH_y\)

có: \(x:y=n_C:n_H=0,1:0,4=1:4\)

=> X là: \(CH_4\)

Sơ đồ pứ: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

\(m_{CH_4}=3,6+0,2.44-0,2.32=6\left(g\right)\)

\(a.n_{CO_2}=\dfrac{4,4}{44}=0,1\left(mol\right);n_{O_2}=\dfrac{0,6.10^{23}}{6.10^{23}}=0,1\left(mol\right)\\ V_{hh}=\left(0,5+1,5+0,1+0,1\right).22,4=49,28\left(l\right)\\ b.m_{hh}=0,5.28+1,5.2+4,4+0,1.32=24,6\left(g\right)\)

a, V_{N\(_2\)} ( đktc ) = 0,5 . 22,4 = 11,2 lít

V_{H\(_2\)}  = 1,5 . 22,4 = 33,6 lít

\(n_{CO_2}=\dfrac{4,4}{44}=0,1\) ( mol )

=> \(V_{CO_2}=0,1.22,4=2,24\) ( lít )

\(n_{O_2}=\dfrac{0,6.10^{23}}{6.10^{23}}=0,1\) ( mol )

=> V_{\(O_2\)} = 0,1 .22,4 = 2,24 lít

=> V_hh = 11,2 + 33,6 + 2,24 + 2,24 = 49,28 lít

b, \(m_{N_2}=0,5.28=14\) ( g )

\(m_{H_2}=1,5.2=3\) ( g )

\(m_{CO_2}=0,1.44=4,4\) ( g )

\(m_{O_2}=0,1.32=3,2\) (g)

\(m_{hh}=14+3+4,4+3,2=24,6\) ( g )