Помогите пажалуста Na+HCl= Na2So4+HCI= fe(oh)3+hno3= au+h2so4= nacl+hno3= cu+hcl=
Na+HCl=NaCl+H2 Na2SO4+HCl=NaCl+H2SO4 Fe(OH)3+HNO3=Fe(NO3)3+H2O Au+H2SO4=H2S+AuSO4 NaCl+HNO3=NaNO3+HCl Cu+HCl=CuCl2+H2