Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
Ta có: \(n_{CH_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
a, Theo PT: \(n_{O_2}=2n_{CH_4}=1\left(mol\right)\)
\(\Rightarrow V_{O_2}=1.22,4=22,4\left(l\right)\)
b, \(V_{kk}=\dfrac{22,4}{20\%}=112\left(l\right)\)
\(n_{KMnO_4}=\dfrac{18.96}{158}=0.12\left(mol\right)\)
\(2KMnO_4\underrightarrow{t^0}K_2MnO_4+MnO_2+O_2\)
\(0.12...........................................0.06\)
\(V_{O_2}=0.06\cdot22.4=1.344\left(l\right)\)
\(n_{Al}=\dfrac{5.4}{27}=0.2\left(mol\right)\)
\(4Al+3O_2\underrightarrow{t^0}2Al_2O_3\)
\(0.08.....0.06.......0.04\)
\(m_{Al\left(dư\right)}=\left(0.2-0.08\right)\cdot27=3.24\left(g\right)\)
\(m_{Al_2O_3}=0.04\cdot102=4.08\left(g\right)\)
Ta có: \(n_{CH_4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
____0,2___0,4 (mol)
\(\Rightarrow V_{O_2}=0,4.22,4=8,96\left(l\right)\)
Bạn tham khảo nhé!
nCH4 = 4,48/22,4 = 0,2 (mol)
PTHH: CH4 + 2O2 -> (t°) CO2 + 2H2O
Mol: 0,2 ---> 0,4
VO2 = 0,4 . 22,4 = 8,96 (l)
1)
$CH_4 +2 O_2 \xrightarrow{t^o} CO_2 + 2H_2O$
Theo PTHH :
$V_{O_2\ cần\ dùng} = 2V_{CH_4} = 24,79(lít)$
$V_{CO_2} = V_{CH_4} = 12,395(lít)$
2)
a)
$C_2H_4 + 3O_2 \xrightarrow{t^o} 2CO_2 + 2H_2O$
$V_{O_2} = 3V_{C_2H_4} = 14,874(lít)$
b) $V_{không\ khí} = V_{O_2} : 20\% = 14,874 : 20\% = 74,37(lít)$
\(n_{Mg}=\dfrac{4,8}{24}=0,2mol\)
\(2Mg+O_2\rightarrow\left(t^o\right)2MgO\)
0,2 0,1 ( mol )
\(V_{kk}=V_{O_2}.5=0,1.22,4.5=11,2l\)
\(a) 4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3\\ n_{O_2} = \dfrac{3}{4},n_{Al} = \dfrac{3}{4}.\dfrac{5,4}{27} = 0,15(mol)\\ V_{O_2} = 0,15.22,4 = 3,36(lít)\\ c)\ CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O\\ V_{O_2} = 2V_{CH_4} = 2,24.2 = 4,48(lít)\)
\(a.\)
\(n_{Al}=\dfrac{5.4}{27}=0.2\left(mol\right)\)
\(4Al+3O_2\underrightarrow{t^0}2Al_2O_3\)
\(0.2.....0.15\)
\(V_{O_2}=0.15\cdot22.4=3.36\left(l\right)\)
\(b.\)
\(n_{CH_4}=\dfrac{2.24}{22.4}=0.1\left(mol\right)\)
\(CH_4+2O_2\underrightarrow{t^0}CO_2+2H_2O\)
\(0.1.........0.2\)
\(V_{O_2}=0.2\cdot22.4=4.48\left(l\right)\)