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Anuta_ua [19.1K]
3 years ago
13

WHAT IS THE PERCENT BY VOLUME OF ETHANOL IN A SOLUTION THAT CONTAINS 35 mL ETHANOL IN 115 mL OF WATER?

Chemistry
1 answer:
Dmitry [639]3 years ago
3 0
We need to first add both of the solution volumes together 35+115=150. Now we can divide the volume of the ethanol by the total volume 35/150=.233. To double check we can multiply the total volume by the percentage of ethanol by volume we got as a solution 150x.233=35. So the percentage by volume of ethanol in the solution is .233x100=23.3%.
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See explanation

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timofeeve [1]

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4 0
3 years ago
10.
Andru [333]

Answer: 1.8 moles Fe and 2.7 moles CO_2 are produced.

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Fe_2O_3+3CO\rightarrow 2Fe+3CO_2  

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Thus 2.7 moles of CO will require=\frac{1}{3}\times 2.7=0.9moles  of Fe_2O_3

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As 3 moles of CO give = 2 moles of Fe  and 3 moles of CO_2

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