Do hòa tan X vào HCl thu được hỗn hợp lhis
=> Trong X có Mg dư
\(n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\)
=> \(n_S=\dfrac{2,4}{32}=0,075\left(mol\right)\)
PTHH: Mg + S --to--> MgS
0,075<-0,075->0,075
Mg + 2HCl --> MgCl2 + H2
0,025---------------->0,025
MgS + 2HCl --> MgCl2 + H2S
0,075------------------->0,075
=> \(M_Y=\dfrac{0,025.2+0,075.34}{0,025+0,075}=26\left(g/mol\right)\)
=> \(d_{Y/H_2}=\dfrac{26}{2}=13\)