Question

[Ngan Tran]

Giúp mik hay bài này vs ạ, cần gắp

Answer 1

[hnamyuh]

Bài 3 : 

a) $Zn + 2HCl \to ZnCl_2 + H_2$
b) $n_{H_2} = n_{Zn} = \dfrac{6,5}{65} = 0,1(mol)$

$V_{H_2} = 0,1.22,4 = 2,24(lít)$

c) $n_{ZnCl_2} = n_{Zn} = 0,1(mol)$

$m_{ZnCl_2} = 136.0,1 = 13,6(gam)$

Bài 4 : 

a) $2Zn + O_2 \xrightarrow{t^o} 2ZnO$

b)

$n_{Zn} = \dfrac{6,5}{65} = 0,1(mol)$
$n_{O_2} = \dfrac{1}{2}n_{Zn} = 0,05(mol)$

$V_{O_2} = 0,05.22,4 = 1,12(lít)$

c) $n_{ZnO} = n_{Zn} = 0,1(mol) \Rightarrow m_{ZnO} = 0,1.81 = 8,1(gam)$