a)
Coi $n_{N_2} = n_{O_2} = 1(mol)$
\(M_A=\dfrac{28.1+32.1}{2}=30\)
Suy ra : $d_{A/H_2} = \dfrac{30}{2} = 15$
b)
Coi $m_{N_2} = m_{O_2} = 224(gam)$
Suy ra:
$n_{N_2} = \dfrac{224}{28} = 8(mol)$
$n_{O_2} = \dfrac{224}{32} = 7(mol)$
$M_A = \dfrac{224 + 224}{8 + 7} = 29,87(g/mol)$
$d_{A/H_2} = \dfrac{29,87}{2} = 14,935$