a. Ta có: \(\overline{M_{hh}}=\dfrac{28.1+2.3}{1+3}=8,5\left(g\right)\)
=> \(d_{\dfrac{hh}{O_2}}=\dfrac{\overline{M_{hh}}}{M_{O_2}}=\dfrac{8,5}{32}=0,265626\left(lần\right)\)
b. Ta có: \(V_{N_2}=1.22,4=22,4\left(lít\right)\)
\(V_{H_2}=3.22,4=67,2\left(lít\right)\)
=> \(\%_{V_{N_2}}=\dfrac{22,4}{22,4+67,2}.100\%=25\%\)
\(\%_{V_{H_2}}=100\%-25\%=75\%\)
Ta có: \(m_{N_2}=1.28=28\left(g\right)\)
\(m_{H_2}=3.2=6\left(g\right)\)
=> \(\%_{m_{N_2}}=\dfrac{28}{28+6}.100\%=82,35\%\)
\(\%_{m_{H_2}}=100\%-82,35\%=17,65\%\)