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Ethylene glycol, C2H6O2, is an odorless, colorless, sweet-tasting liquid used in antifreeze formulations. The antifreeze formulations are 56% ethylene glycol by mass. (Assume the density of the ethylene glycol solution is 1.072 g/mL).What volume of a solution contains 0.350 moles ethylene glycol, C2H6O2?

Sagot :

The first step to solve this problem is using the molecular mass of ethyleneglycol to find the mass of 0.350moles of this compound.

[tex]0.350mol\cdot\frac{62.07g}{mol}=21.7245g[/tex]

Use the percent by mass to find the mass of the solution, remember that there are 56g of ethyleneglycol for every 100g of solution:

[tex]21.7245g\cdot\frac{100g}{56g}=38.79375g[/tex]

Use the density of the solution to find how many mililiters contain the estimated mass of solution :

[tex]38.79375g\cdot\frac{ml}{1.072g}=36.18ml[/tex]

The volume of solution that contains 0.350 moles of ethylene glycol is 36.18ml.

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