How many ions are produced in solution by dissociation of one formula unit of Co(NO3)2·6H2O?

Question

Answer key says it is 3. How do you get to that answer?

Answer 1

Look at the dissociation of Co(NO3)2·6H2O

Co(NO3)2·6H2O => Co²⁺ + 2 NO₃^- + 6H₂O

Thus you have 1 Co ion and 2 NO₃ ions for a total of 3 ions per formula unit