\(n_{CH_4}=\dfrac{V}{22,4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PTHH : CH4 + 2O2 --to--> CO2 + 2H2O
..........0,2 .......0,4............0,2............0,4 (mol)
=> \(V_{O_2}=n\cdot22,4=0,4\cdot22,4=8,96 \left(l\right)\)
b) PTHH
CO2 + Ba(OH)2 ----> BaCO3\(\downarrow\) + H2O
..0,2.......0,2.....................0,2........0,2 (mol)
=> \(m_{BaCO_3}=n\cdot M=0,2\cdot197=39,4\left(g\right)\)
hok tốt nhé
\(n_{CH_4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PTHH: \(CH_4+2O_2\underrightarrow{t^o}2H_2O+CO_2\left(1\right)\)
a. Theo PT ta có: \(n_{O_2}=2.n_{CH_4}=2.0,2=0,4\left(mol\right)\)
Thể tích khí oxi tham gia phản ứng là:
\(V_{O_2}=0,4.22,4=8,96\left(l\right)\)
b. PTHH: \(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)
Theo PT 1 ta có: \(n_{CO_2}=0,2\left(mol\right)\)
\(n_{CaCO_3}=n_{CO_2}=0,2\left(mol\right)\)
\(\Rightarrow m_{CaCO_3}=0,2.100=20\left(g\right)\)
a) \(n_{CH_4}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PTHH: \(CH_4+2O_2\rightarrow CO_2+2H_2O\)
.............1..........2 (mol)
.............0,2 ......a (mol)
Gọi a là số mol của \(O_2\)
Theo PTHH: \(\Rightarrow n_{O_2}=a=0,4\left(mol\right)\)
\(\Rightarrow n_{O_2}=0,4.22,4=8,96\left(l\right)\)