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Counting Recovered Product After a Recycle 4 questions
Counting Recovered Product After a Recycle
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A process model converts one mole of A to one mole of B. Each pass converts 60% of the A fed to it. The collection step saves 80% of the B that forms. Uncollected B is separated from the unreacted A and cannot enter a later pass. Treat the two fractions as exact model values.
| First-pass record | Value |
|---|---|
| A fed into the process | 0.100 mol |
| Fraction of A converted | 0.60 |
| Fraction of formed B collected | 0.80 |
Question 1
Calculate how much B forms on the first pass and how much of that B is collected.
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Question 2
How much unreacted A leaves the first pass?
- 0.012 mol
- 0.040 mol
- 0.048 mol
- 0.060 mol
The model sends all the unreacted A through the same process one more time. No fresh A is added. The fractions converted and collected are unchanged.
Question 3
Calculate how much more B is collected in the second pass and how much is collected over both passes.
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Question 4
A student says the two-pass collection amount accounts for every mole of A that reacted. Explain what the calculation omits.
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