A solution containing 41.8 g of nitrate, sulfate, and sodium carbonate was added with 92 cm3 of sulfuric acid solution (w=10%, p=1.065 g / cm3). In this stood out of 2.24 dm3 (n) of gas. Subsequent addition of barium chloride to the resulting solution resulted in 46.6 g of precipitation. Determine the mass fraction of salts in the initial mixture, taking into account that sodium sulfate is not formed.