\(n_{O_2}=\dfrac{6,72}{5.22,4}=0,06\left(mol\right)\\ PTHH:2Zn+O_2\underrightarrow{t^o}2ZnO\\ Mol:0,03\leftarrow0,06\rightarrow0,03\\ \rightarrow\left\{{}\begin{matrix}a=0,03.65=1,95\left(g\right)\\x=0,03.81=2,43\left(g\right)\end{matrix}\right.\)

\(PTHH:2KMnO_4\underrightarrow{t^o}K_2MnO_4+MnO_2+O_2\uparrow\)

                     0,12                                         0,06

\(\rightarrow m_{KMnO_4}=0,12.158=18,96\left(g\right)\)

a) \(n_{CH_4}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

\(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

PTHH: CH₄ + 2O₂ --t^o--> CO₂ + 2H₂O

          0,05-->0,1------->0,05

             2C₂H₂ + 5O₂ --t^o--> 4CO₂ + 2H₂O

            0,125<--0,3125<----0,25

=> \(\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,05}{0,05+0,125}.100\%=28,57\%\\\%V_{C_2H_2}=\dfrac{0,125}{0,05+0,125}.100\%=71,43\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{CH_4}=\dfrac{0,05.16}{0,05.16+0,125.26}.100\%=19,753\%\\\%m_{C_2H_2}=\dfrac{0,125.26}{0,05.16+0,125.26}.100\%=80,247\%\end{matrix}\right.\)

b) \(n_{O_2}=0,1+0,3125=0,4125\left(mol\right)\)

=> \(V_{O_2}=0,4125.22,4=9,24\left(l\right)\)

=> V_kk = 9,24.5 = 46,2 (l)

\(C_4H_{10}+\dfrac{13}{2}O_2-t^0->4CO_2+5H_2O\\ a.V_{KK}=\dfrac{5,6\cdot\dfrac{13}{2}}{0,2}=182\left(L\right)\\ b.CO_2+Ca\left(OH\right)_2->CaCO_3+H_2O\\ m_{KT}=100\cdot\dfrac{5,6}{22,4}\cdot4=100g\)

a, PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

\(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)

Ta có: \(n_{CH_4}+n_{C_2H_4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\left(1\right)\)

Theo PT: \(n_{CO_2}=n_{CH_4}+2n_{C_2H_4}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\left(2\right)\)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{CH_4}=0,2\left(mol\right)\\n_{C_2H_4}=0,1\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,2.22,4}{6,72}.100\%\approx66,67\%\\\%V_{C_2H_4}\approx33,33\%\end{matrix}\right.\)

b, Theo PT: \(n_{O_2}=2n_{CH_4}+3n_{C_2H_4}=0,7\left(mol\right)\)

\(\Rightarrow V_{O_2}=0,7.22,4=15,68\left(l\right)\)

A tác dụng với NaHCO₃ cho khí CO2 → A: axit CH₃COOH

BTKL: m + m_O2 = m_CO2 + m_H2O => m = 1,8

=> n_CH3COOH = 0,03

CH₃COOH + C₂H₅OH → CH₃COOC₂H₅ + H₂O

0,03                 0,02                 0,0125

=> H = 62,5%

\(pthh:S+O_2\overset{t^o}{--->}SO_2\)

\(n_S=\dfrac{32}{32}=1\left(mol\right)\)

Theo pt: \(n_{O_2}=n_S=1\left(mol\right)\)

\(\Rightarrow V_{kk}=1.22,4.5=112\left(lít\right)\)

Chọn A

a, Theo giả thiết ta có: \(n_P=\dfrac{3,1}{31}=0,1\left(mol\right)\)

\(4P+5O_2--t^o->2P_2O_5\)

Ta có: \(n_{O_2}=\dfrac{5}{4}.n_P=0,125\left(mol\right)\Rightarrow V_{O_2\left(đktc\right)}=0,125.22,4=2,8\left(l\right)\)

b, Theo giả thiết ta có: \(n_{CH_4}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

\(CH_4+2O_2--t^o->CO_2+2H_2O\)

Ta có: \(n_{O_2}=2.n_{CH_4}=0,1\left(mol\right)\Rightarrow V_{O_2\left(đktc\right)}=2,24\left(l\right)\)

a, \(n_{C_2H_4}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

PT: \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)

\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)

Theo PT: \(n_{CaCO_3}=n_{CO_2}=2n_{C_2H_4}=0,1\left(mol\right)\)

\(\Rightarrow m_{CaCO_3}=0,1.100=10\left(g\right)\)

b, Theo PT: \(n_{O_2}=3n_{C_2H_4}=0,15\left(mol\right)\Rightarrow V_{O_2}=0,15.22,4=3,36\left(l\right)\)

\(\Rightarrow V_{kk}=\dfrac{V_{O_2}}{20\%}=16,8\left(l\right)\)