Bài 3:
a, PTHH: Mg + 2HCl \(\rightarrow\) MgCl2 + H2
b, \(n_{Mg}=\dfrac{7,2}{24}=0,3mol\)
\(n_{MgCl_2}=0,3.1=0,3mol\\ \Rightarrow m_{MgCl_2}=0,3.95=28,5g\)
c, \(n_{H_2}=0,3.1=0,3mol\\ \Rightarrow V_{H_2}=0,3.22,4=6,72l\)
Bài 4:
a, PTHH: Zn + 2HCl \(\rightarrow\) ZnCl2 + H2
b,
\(n_{Zn}=\dfrac{13}{65}=0,2mol\\ \Rightarrow n_{ZnCl_2}=0,2.1=0,2mol\\ m_{ZnCl_2}=0,2.136=27,2g\)
c, \(n_{H_2}=0,2.1=0,2mol\\ \Rightarrow V_{H_2}=0,2.22,4=4,48l\)