a, PTHH: Zn+H2SO4--->ZnSO4+H2 (1)
nH2= \(\dfrac{6,72}{22,4}=0,3\) mol
Theo pt(1): nZn=nH2= 0,3 mol
=>mZn= 0,3.65= 19,5 (g)
b, Đổi 100ml= 0,1 lit
Theopt(1): nH2SO4=nH2= 0,3mol
=> CMH2SO4= \(\dfrac{0,3}{0,1}=3M\)
c, pthh: Zn+2HCl--->ZnCl2+H2 (2)
Theo pt(2): nHCl= 2.nH2= 2.0,3= 0,6 mol
=> mHCl= 0,6.36,5= 21,9 (g)
=> mddHCl= \(\dfrac{21,9.100\%}{10\%}=219\left(g\right)\)