C = md/ms*100 => md = C*ms/100 = 36,5*400/100 = 146g HCl
n = m/M = 146/36,5 = 4 moli HCl
Zn + 2HCl ⇒ ZnCl₂ + H₂↑
2 moli HCl..................1 mol H₂
4 moli HCl.................x = 2 moli H₂
N₂ + 3H₂ ⇒ 2NH₃
3 moli H₂.................2*17g NH₃
2 moli H₂.................x = 22,66g NH₃