$B_2O_3\left(aq\right)\ +\ H_2O\left(l\right)\ \rightarrow\ 2H_3BO_3\left(aq\right)$  

 $4NH_3\left(g\right)\ +\ 5O_2\left(g\right)\ +\ 4NO\left(g\right)\ +\ 6H_2O\left(l\right)$  

 $4HNO_3\left(aq\right)\rightarrow\ 4NO_2\left(aq\right)\ +\ 2H_2O\left(l\right)\ +\ O_2\left(g\right)$