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\(n_{CH_4}=\dfrac{6,4}{16}=0,4mol\)
\(CH_4+2O_2\rightarrow\left(t^o\right)CO_2+2H_2O\)
0,4 0,8 0,4 ( mol )
\(m_{CO_2}=0,4.44=17,6g\)
\(V_{O_2}=0,8.22,4=17,92l\)
\(n_{CH_4}=\dfrac{32}{16}=2\left(mol\right)\)
\(CH_4+2O_2\underrightarrow{t^0}CO_2+2H_2O\)
\(2...........4.........2\)
\(m_{O_2}=4.\cdot32=128\left(g\right)\)
\(m_{CO_2}=2\cdot44=88\left(g\right)\)
\(d_{\dfrac{CO_2}{kk}}=\dfrac{M_{CO_2}}{M_{kk}}=\dfrac{44}{29}=1.5\)
Khí : CO2 nặng hơn và nặng gấp 1.5 lần không khí.
PTHH: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
a) Ta có: \(n_{CH_4}=\dfrac{32}{16}=2\left(mol\right)\)
\(\Rightarrow n_{O_2}=4mol\) \(\Rightarrow m_{O_2}=4\cdot32=128\left(g\right)\)
b) Theo PTHH: \(n_{CO_2}=n_{CH_4}=2mol\)
\(\Rightarrow m_{CO_2}=2\cdot44=88\left(g\right)\)
c) Ta có: \(d_{CO_2/kk}=\dfrac{44}{29}\approx1,52\)
Vậy CO2 nặng hơn không khí 1,52 lần
\(n_{CH_4}=\dfrac{3,2}{16}=0,2\left(mol\right)\)
PTHH: CH4 + 2O2 --to--> CO2 + 2H2O
0,2--->0,4--------->0,2
\(\rightarrow\left\{{}\begin{matrix}V_{O_2}=0,4.22,4=8,96\left(l\right)\\m_{CO_2}=0,2.44=8,8\left(g\right)\end{matrix}\right.\)
\(n_{Mg}=\dfrac{4,8}{24}=0,2\left(mol\right)\\
pthh:CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
0,2 0,4 0,4
\(V_{O_2}=0,4.22,4=8,96\left(l\right)\\
m_{H_2O}=0,4.18=7,2\left(g\right)\)
\(n_{CO_2}=\dfrac{4.4}{44}=0.1\left(mol\right)\)
\(CH_4+2O_2\underrightarrow{^{^{t^0}}}CO_2+2H_2O\)
\(0.1.......0.2........0.1..........0.2\)
\(m_{CH_4}=0.1\cdot16=1.6\left(g\right)\)
\(V_{H_2O}=0.2\cdot22.4=4.48\left(l\right)\)
\(V_{kk}=5V_{O_2}=5\cdot0.2\cdot22.4=22.4\left(l\right)\)
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: \(n_{O_2}=2.n_{CH_4}=0,1\left(mol\right)\Rightarrow V_{O_2\left(đktc\right)}=2,24\left(l\right)\)
Bài 1:
a. CH4 + 2O2 ---> 2 H2O + CO2
0,2------------0,4--------------------0,2 (mol)
nCH4=\(\dfrac{3,2}{16}\)=0,2(mol)
=> nO2=0,2*2=0,4 (mol)=> VO2=0,4*22,4=8,96(l)
b. nCO2=0,2 (mol)
=>mCO2=0,2*44=8,8(g)
a) PTHH: CH4 + 2 O2 -to-> CO2 + 2 H2O
b) \(n_{CH_4}=\dfrac{3,2}{16}=0,2\left(mol\right)\)
-> \(n_{O_2}=2.n_{CH_4}=2.0,2=0,4\left(mol\right)\)
=> \(V_{O_2\left(đktc\right)}=0,4.22,4=8,96\left(l\right)\)
c) \(n_{CO_2}=n_{CH_4}=0,2\left(mol\right)\\ \rightarrow m_{CO_2\left(đktc\right)}=0,2.44=8,8\left(g\right)\)
a. PTHH: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
b. \(n_{CH_4}=\dfrac{3,4}{16}=0,2\left(mol\right)\)
\(n_{O_2}=\dfrac{2.n_{CH_4}}{1}=2.0,2=0,4\left(mol\right)\)
\(V_{O_2}=22,4.n_{O_2}=22,4.0,4\approx9\left(l\right)\)
c. \(n_{CO_2}=n_{CH_4}=0,2\left(mol\right)\)
\(m_{CO_2}=n_{CO_2}.M_{CO_2}=0,2.44=8,8\left(g\right)\)