a) 4NH3 + 5O2 -to-> 4NO + 6H2O
4:5:4:6
b) S + 2HNO3 --> H2SO4 + 2NO
1:2:1:2
c) 3Ba(NO3)2 + Al2(SO4)3 --> 3BaSO4\(\downarrow\) + 2Al(NO3)3
3:1:3:2
d) FeCl3 + 3AgNO3 --> Fe(NO3)3 + 3AgCl\(\downarrow\)
1:3:1:3
\(a.4NH_3+5O_2\rightarrow4NO+6H_2O\)
\(NH_3\div NO=4\div4=1\div1\)
\(b.S+2HNO_3\rightarrow H_2SO_4+2NO\)
\(HNO_3\div NO=2\div2=1\div1\)
\(c.2Ba\left(NO_3\right)_2+Al_2\left(SO_4\right)\rightarrow2BaSO_4+4NO\)
\(Ba\left(NO_3\right)_2\div BaSO_4=2\div2=1\div1\)
\(d.FeCl_3+3AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\) (ban sai de mik sua lai)
\(AgNO_3\div AgCl=3\div3=1\div1\)