Answer :
In order to prepare 0.13 m nano3 for a lab experiment in a 250-ml volumetric flask, a student needs to weigh out 2.76gof nano3 to dissolve in the flask.
A form of laboratory glassware used to produce solutions is a volumetric flask. A volumetric flask is a bulb with a flat bottom and an extended neck that is calibrated to retain a specific volume at a mark on the neck. The flask can also be referred to as a graduated flask. The volume of the NaNO3 solution is 250 mL, and its molarity is 0.13 M. 250 mL of 0.15 M NaNO3 is calculated as (250/1000)L * (0.13 mol/L) = 0.0325 mol. Weight of 0.0375 mol is required since the molar mass of NaNO3 is 85 g/mol. 2.76g of NaNO3 are equal to 0.0325 mol*(85 g/mol). It is necessary to weigh 2.76 g of NaNO3.
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