Write yes or no if any of the following reactions could be written as net ionic equations.
_____a. CH4 (g) + 2 O2 (g) = CO2 (g) + 2 H2 O(g)
_____b. Cu(s) + 2 AgNO3 (aq) = 2 Ag(s) + Cu(NO3 )2 (aq)
_____c. MgCl2 (aq) + 2 KOH(aq) = Mg(OH)2 (s) + 2 KCl(aq)
_____d. CaCO3 (s) + 2 HCl(aq) = CaCl2 (aq) + CO2 (g) + H2 O(l)