Giả sử \(100g\) hỗn hợp \(A\)
\(m_{O_2}=100.50\%=50\left(g\right)\)
\(\Leftrightarrow n_{O_2}=\dfrac{m_{O_2}}{M_{O_2}}=\dfrac{50}{32}=1,5625\left(mol\right)\)
\(m_{N_2}=100.14\%=14\left(g\right)\)
\(\Leftrightarrow n_{N_2}=\dfrac{m_{N_2}}{M_{N_2}}=\dfrac{14}{28}=0,5\left(mol\right)\)
\(m_{H_2}=100-50-14=36\left(g\right)\)
\(\Leftrightarrow n_{H_2}=\dfrac{m_{H_2}}{M_{H_2}}=\dfrac{36}{2}=18\left(mol\right)\)
Ta có:
\(\overline{M}=\dfrac{100}{1,5625+0,5+18}=4,984\) (g/mol)
\(d\)A/kk=\(\dfrac{4,984}{29}=0,172\)