Question

Giải giúp e với

Answer 1

Bài 2:

PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2O\)

Ta có: \(n_{Zn}=n_{H_2}=\dfrac{1}{2}n_{HCl}=\dfrac{1}{2}\cdot0,25=0,125\left(mol\right)\) \(\Rightarrow\left\{{}\begin{matrix}m_{Zn}=0,125\cdot65=8,125\left(g\right)\\V_{H_2}=0,125\cdot22,4=2,8\left(g\right)\end{matrix}\right.\)

Answer 2

Bài 1:

\(SO_2+\dfrac{1}{2}O_2\xrightarrow[V_2O_5]{t^o}SO_3\)

\(SO_3+H_2O\rightarrow H_2SO_4\)

\(H_2SO_4+BaCl_2\rightarrow2HCl+BaSO_4\downarrow\)

\(H_2SO_4+Mg\rightarrow MgSO_4+H_2\uparrow\)

*PT cuối ko nhìn rõ :))