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Calculate the molarity of a solution prepared by dissolving 12.3 g of Na2CrO4 in enough water to produce a solution with a volume of 770. mL .

User Thebadguy
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1 Answer

7 votes

Answer:


\large \boxed{\text{0.0980 mol/L}}

Step-by-step explanation:

The formula for molar concentration c is


c =  \frac{\text{moles}}{\text{litres}}\\\\\text{Moles} = \text{12.3 g} * \frac{\text{1 mol}}{\text{162.97 g}} = \text{0.0755 mol }\\\\\text{Litres} = \text{770. mL} * \frac{\text{1 L}}{\text{1000 mL}} = \text{0.770 L }\\\\c = \frac{\text{0.0755 mol}}{\text{0.770 L}} = \text{0.0980 mol/L }\\\\

User Sudarshan S
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