what are two possible solutions for the decomposition of sodium bicarbonate?

Question

some possible products are Na2CO3, C, CO, O2,and H2

Answer 1

The answer given earlier is more feasible i.e decomposing sodium hydrogen carbonate, the equation thus:

2NaHCO3 --> Na2CO3 + CO2 + H2O

But, the decomposition for your specific enquiry thus:
Na2CO3 --> CO2+Na2O

I hope this helps

Answer 2

I will give you one - the standard:

2NaHCO3 --> Na2CO3 + H2O + CO2

I don't know if there is another.

Answer 3

the two possible decomposition is:
NaCO3 and CO2, H2O