a,PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
Ta có: \(n_{CH_4}=\dfrac{3,2}{16}=0,2\left(mol\right)\)
Theo PT: \(n_{O_2}=2n_{CH_4}=0,4\left(mol\right)\)
\(\Rightarrow V_{O_2}0,4.22,4=8,96\left(l\right)\)
b, Theo PT: \(n_{CO_2}=n_{CH_4}=0,2\left(mol\right)\)
PT: \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)
Theo PT: \(n_{CaCO_3}=n_{CO_2}=0,2\left(mol\right)\)
\(\Rightarrow m_{\downarrow}=m_{CaCO_3}=0,2.100=20\left(g\right)\)
Bạn tham khảo nhé!