Using the experimental data, what mass of the solid product, NaOH, should remain for Reaction I?

Initial Mass: 7.53 g NaHCO
Three potential reactions for this experiment are:

Reaction I:
NaHCO3(s) → NaOH(s) + CO2(g)

Reaction II:
2NaHCO3(s) → Na2O(s) + 2CO2(g) + H2O(g)

Reaction III:
2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)