Có: \(\dfrac{M_A}{M_{O_2}}=\dfrac{\dfrac{m_A}{n_A}}{\dfrac{m_{O_2}}{n_{O_2}}}=\dfrac{m_A}{m_{O_2}}.\dfrac{n_{O_2}}{n_A}=1.\dfrac{V_{O_2}}{V_A}=\dfrac{1}{2}\)
=> \(M_A=\dfrac{1}{2}.M_{O_2}=16\left(g/mol\right)\)
=> A là CH4
PTHH: CH4 + 2O2 --to--> CO2 + 2H2O
1---->2
=> VO2 = 2.22,4 = 44,8 (l)