Complete and balance each of the following molecular reactions. Indicate the phase of each species. If no reaction occurs, write N.R.

Question

A) ____ Na2CO3 (aq) + ___ Mg (NO3)2 (aq) -->
B)____ K2SO4(aq) + ___ Fe(CH3CO2)2 (aq) -->
C)___ AlCl3 (aq) +____ K2S (aq)

Please help and explain!!