If the Concentration of Sodium Carbonate in Water Is 12 $\times$

question 12

Multiple Choice

If the concentration of sodium carbonate in water is 12.8 ppm,what is the molarity of Na₂CO₃(aq) ? The molar mass of Na₂CO₃ is 106.0 g/mol.Assume the density of the solution is 1.00 g/mL.

• A) 8.28 \(\times\) 10^-6 M
• B) 1.21 \(\times\) 10^-4 M
• C) 1.36 \(\times\) 10^-3 M
• D) 0.136 M
• E) 0.121 M

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