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12.5 g of [tex]$\text{Na}_2\text{CO}_3$[/tex] is dissolved in water to make 325 mL of solution. What is the concentration?

A. 3.85 g/mL
B. 0.0385 g/mL
C. 0.385 g/mL
D. 38.5 g/mL

Answer :

Final answer:

The concentration of a solution made by dissolving 12.5 g of Na2CO3 in 325 ml of water is 0.0385 g/mL, which is option B.

Explanation:

To calculate the concentration of a sodium carbonate (Na2CO3) solution when 12.5 g Na2CO3 is dissolved in 325 ml of water, you need to divide the mass of the solute by the volume of the solution. The result will give you the concentration in grams per milliliter (g/mL).

The calculation is as follows:

Concentration = Mass of Na2CO3 / Volume of solution
= 12.5 g / 325 mL
= 0.0385 g/mL

Therefore, the correct concentration of the solution is 0.0385 g/mL, which corresponds to option B.

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