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3 molar = 3 moles per (one) litre = 3 mol/L = 3 mol/1 L = 2*(3 mol) / 2*(1 L) = 6 mol/2L = 6 moles per 2 litre

(all this has nothing to do with chemistry but with normal calculus)

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Q: How many moles of solute are contained in a 3 molar solution that has a solution that has a volume of 2 Liters?
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