Questions by Douglas62730

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Design a distillation column that separates a mixture of ethanol and water with a 95% ethanol purity and a production rate of 1000 liters per hour. The mixture contains 50% ethanol and 50% water by volume. The distillation column should operate at a pressure of 1 atm and a temperature range of 78-85°C. Assume that the feed enters the column as a saturated liquid and that the overhead product is 90% ethanol, while the bottom product is 5% ethanol. Determine the number of stages required and the reflux ratio for this system.

asked 2 days ago in Chemical engineering

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1 answer 5 views

A chemistry student performed a reaction that produced 2.0 grams of product. The theoretical yield for this reaction is 2.5 grams. Calculate the percent yield for this reaction.

asked Jan 22 in Chemical reactions

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1 answer 16 views

When assessing community needs, what is the term for conducting an in-depth investigation?

asked Jan 17 in Psychology

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1 answer 26 views

According to Maslow, when are physiological needs the most fundamental?

asked Jan 15 in Psychology

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1 answer 24 views

According to the theory of mind, how do people infer the mental states of others?

asked Jan 15 in Psychology

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1 answer 22 views

What is produced when sulfur and oxygen combine?

asked Jan 6 in Science

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1 answer 28 views

The sum of the kinetic and potential energies of a system’s atoms and molecules is called what?

asked Jan 2 in Science

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1 answer 52 views

On what basis are lipoproteins classified?

asked Dec 31, 2024 in Science

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1 answer 7 views

In which part of the ear are the vibrations amplified by the malleus, incus, and stapes?

asked Dec 27, 2024 in Science

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1 answer 20 views

Distinguishing between homology and analogy is critical in reconstructing what?

asked Dec 27, 2024 in Science

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