Sodium nitrate (NaNO3, 85 g/mol) or "sodium nitrate" is part of our "Chilean Saltpeter". This compound has many uses at an industrial level such as fertilizer, preservative in the food industry (E251), additive for cement, etc.

 

In 200 g. of water, 30 g are dissolved. of sodium nitrate. The resulting solution has a density of 1.05 g/mL. An aliquot of 15 mL is taken from this concentrated solution, which is brought to a final volume of 750 mL. Based on this data, What does it calculates: