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A weighted sample of sodium carbonate (FM: 105.99 g/mol) was dissolved to make 250 mL of an aqueous solution. 25 mL of that solution is

A weighted sample of sodium carbonate (FM: 105.99 g/mol) was dissolved to make 250 mL of an aqueous solution. 25 mL of that solution is then pipetted and diluted with 475 mL of water. Assume all volumes are additive. Concentration of the dilute solution is 7.365 mM.
What is the mass of the original sample of sodium carbonate (in g)?

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