a) Gọi số mol Zn, Al là a, b (mol)
=> 65a + 27b = 1,84 (1)
PTHH: Zn + 2HCl --> ZnCl2 + H2
a--------------->a----->a
2Al + 6HCl --> 2AlCl3 + 3H2
b-------------->b----->1,5b
=> 136a + 133,5b = 5,39 (2)
(1)(2) => a = 0,02 (mol); b = 0,02 (mol)
=> \(\left\{{}\begin{matrix}\%m_{Zn}=\dfrac{0,02.65}{1,84}.100\%=70,65\%\\\%m_{Al}=\dfrac{0,02.27}{1,84}.100\%=29,35\%\end{matrix}\right.\)
b) nH2 = a + 1,5b = 0,05 (mol)
=> VH2 = 0,05.22,4 = 1,12 (l)