a) Số mol etilen(đktc):
\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
PTHH: C2H4+3O2---->2CO2+2H2O
0,5 1,5 1 (mol)
Thể tích không khí: \(V_{khongkhi}=5.V_{O_2}=5.1,5.22,4=168\left(l\right)\)
b) Thể tích CO2: \(V_{CO_2}=1.22,4=22,4\left(l\right)\)
(Câu trả lời thứ 511).
\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
PTHH: \(C_2H_4+3O_2-t^o->2H_2O\uparrow+2CO_2\uparrow\)
a. Theo PT ta có: \(n_{O_2}=\dfrac{0,5.3}{1}=1,5\left(mol\right)\)
\(\Rightarrow V_{O_2}=1,5.22,4=33,6\left(l\right)\)
\(\Rightarrow V_{kk}=\dfrac{33,6}{20\%}=168\left(l\right)\)
b. Theo PT ta có: \(n_{CO_2}=\dfrac{0,5.2}{1}=1\left(mol\right)\)
\(\Rightarrow V_{CO_2\left(đktc\right)}=1.22,4=22,4\left(l\right)\)
a) \(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
PTHH: \(C_2H_4+3O_2\rightarrow2CO_2+2H_2O\)
Theo PTHH: \(n_{C_2H_4}:n_{O_2}=1:3\)
\(\Rightarrow n_{O_2}=n_{C_2H_4}.3=0,5.3=1,5\left(mol\right)\)
\(\Rightarrow V_{O_2}=1,5.22,4=33,6\left(l\right)\)
\(\Rightarrow V_{k^2}=\dfrac{33,6}{20\%}.100\%=168\left(l\right)\)
b) Theo PTHH: \(n_{C_2H_4}:n_{CO_2}=1:2\)
\(\Rightarrow n_{CO_2}=n_{C_2H_4}.2=0,5.2=1\left(mol\right)\)
\(\Rightarrow V_{CO_2\left(đktc\right)}=1.22,4=22,4\left(l\right)\)
PTHH: \(C_2H_4+3O_2\rightarrow2CO_2+2H_2O\\ 0,5mol:1,5mol\rightarrow1mol:1mol\)
\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
a. \(V_{O_2}=1,5.22,4=33,6\left(l\right)\)
\(V_{kk}=\dfrac{3,36}{20\%}100\%=168\left(l\right)\)
b. \(V_{CO_2}=1.22,4=22,4\left(l\right)\)