`n_{HCl}=(6,5)/(65)=0,1(mol)`

PTHH:

`Zn+2HCl\to ZnCl_2+H_2\uparrow`

`0,1\to 0,2\to 0,1 \to 0,1(mol)`

`a,``C_{M HCl}=(0,2)/(0,3)=2/3(M)`

`b,` 

`m_{ZnCl_2}=0,1.136=13,6(g)`

`V_{H_2}=0,1.24,79=2,479(l)`

`n_(Zn)=m/M=(6,5)/65=0,1(mol)`

`PTHH:  Zn+2HCl->ZnCl_2+H_2`

`a)` `300  ml=0,3l`

Theo pt: `n_(HCl)=2n_(Zn)=0,2(mol)`

`->  C_{M(HCl)}=n/V=(0,2)/(0,3)~~0,67(M)`

`b)` Theo pt: `n_(ZnCl_2)=n_(Zn)=0,1(mol)`

`->  m_(ZnCl_2)=n.M=0,1.136=13,6(g)`

Theo pt: `n_(H_2)=n_(Zn)=0,1(mol)`

`->  V_{H_2(đkc)}=n.24,79=0,1.24,79=2,479(l)`