TK

Từ C₂H₄O₂ ta có: M = 60 g/mol; m_C = 2 x 12 = 24 g; m_H = 4 x 1 = 4 g;

M_O = 2 x 16 = 32 g.

%C = (24 : 60) x 100% = 40%; %H = (4 : 60) x 100% = 6,67%;

%O = 100% - 40% - 6,67% = 53,33%.

\(n_{CO_2}=\dfrac{22}{44}=0,5\left(mol\right)\\ n_{O_2}=\dfrac{16}{32}=0,5\left(mol\right)\\ V_{hh.khí}=V_{CO_2}+V_{O_2}=\left(0,5+0,5\right).24,79=24,79\left(l\right)\)

C+O2​to-->​CO2​

0,3--0,3--0,3

n_C = 3,6 / 12 = 0,3 (mol)

=> V_CO2(đktc) = 0,3 x 22,4 =6,72lít

=>Vkk=6,72\5=33,6l

PTHH: \(C+O_2\underrightarrow{t^o}CO_2\)

a) Ta có: \(n_C=\dfrac{3,6}{12}=0,3\left(mol\right)=n_{CO_2}\) 

\(\Rightarrow V_{CO_2}=0,3\cdot22,4=6,72\left(l\right)\)

b) Theo PTHH: \(n_{O_2}=n_C=0,3mol\) 

\(\Rightarrow V_{O_2}=6,72\left(l\right)\) \(\Rightarrow V_{kk}=6,72\cdot5=33,6\left(l\right)\)

a.n=0,4:44=...mol

V=molx22,4=..l

\(V_{O_2}=0,25.22,4=5,6\left(l\right)\)

\(V_{N_2}=0,1.22,4=2,24\left(l\right)\)

\(V_{CO_2}=0,45.22,4=10,08\left(l\right)\)

\(V_{hh}=5,6+2,24+10,08=17,92\left(l\right)\)

$V_{hh}=22,4(0,25+0,1+0,45)=17,92(lít)$

\(nCO2=\dfrac{0.44}{44}=0.01mol\)

\(\Rightarrow V_{CO2}=0.01\times22.4=0.224l\)

\(nH2=\dfrac{0.04}{4}=0.01mol\)

\(\Rightarrow V_{H2}=0.01\times22.4=0.224l\)

=> Tổng thể tích: \(V_{CO2}+V_{H2}=0.224+0.224=0.448\)

\(nCH4=\dfrac{1.12}{22.4}=0.05mol\Rightarrow mCH4=0.05\times16=0.8g\)

\(mO2=0.2\times32=6.4g\)

Tổng khối lượng: mCH4 + mO2 = 0.8 + 6.4 = 7.2g