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A certain solution is 70% ethanol and the rest being distilled water. If there are 12 moles of ethanol per litre of solution, find the density of the solution.​

User WPFKK
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1 Answer

4 votes

Answer:


0.55284g/mL

Step-by-step explanation:

Hello there!

In this case, given the by-mass percent of ethanol:


(70gEt)/(100gSol)

It is possible to compute the density by using its molar mass to find the grams in one liter of solution:


12(molEt)/(1L)*(46.07 gEt)/(1molEt)=552.85g/L

However, by taking the g/mL we obtain:


552.84(g)/(L) *(1L)/(1000mL)=0.55284g/mL

Which is the density of the solution.

Best regards!

User Jordan Schuetz
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