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A student needs 6.4 liters of a 0.64 molar solution for an experiment. How many grams of solute does the student need if the molar mass of the solute is 11.83 g/mol? Round your answer to the nearest 0.01, and remember to include units (properly abbreviated), BUT NOT THE SUBSTANCE

User Dzmitry Savinkou
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1 Answer

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19 votes

Multiplying the liters of solution by the concentration we obtain the moles of solute:


n=6.4L\cdot0.64M=4.096\text{moles of solute}

Now, multiply these moles by the molar mass:


4.096\text{moles}\cdot\frac{11.83g}{\text{mol}}=48.46g

There are 48.46g needed.

User Irahorecka
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