\(\dfrac{V_{N_2}}{V_{O_2}}=\dfrac{1}{2}\Rightarrow\)\(\dfrac{n_{N_2}}{n_{O_2}}=\dfrac{1}{2}\)
gọi số mol N2 là x mol
=> số mol O2 là 2x mol
\(\overline{M_{hh}}=\dfrac{x\cdot28+2x\cdot32}{3x}=\dfrac{92}{3}\)
=> \(d_{\dfrac{hh}{kk}}=\dfrac{\overline{M_{hh}}}{M_{kk}}=\dfrac{\dfrac{92}{3}}{29}=\dfrac{92}{87}\)