write balanced equations for each of the following by insert- ing the correct coefficients in the blanks: (a) cu(no3)2(aq) koh(aq) ⟶ cu(oh)2(s) kno3(aq) (b) bc13(g) h2o(l) ⟶ h3(bo3(s) hc1(g) (c) casio3(s) hf(g) ⟶ sif4(g) caf2(s) h2o(l) (d) (cn)2(g) h2o(l) ⟶ h2c2o4(aq) nh3(g