Is this a stoichiometric amount for mixing Mg(NO3)2 = 86.30994g and NaHCO3 = 84.00661g to make MgCO3 + NaNO3?

Ive tested this by mixing equal parts of both chemicals and adding hot water to it. There was a precipitate of MgCO3 and NaNO3 left in the solution. I haven't tested this exact weight yet because my scale is broken. I want to know if these equations will make Sodium Nitrate and Magnesium Carbonate stoichiometricly