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Checking Pressure After a Solid Runs Out 4 questions
Checking Pressure After a Solid Runs Out
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A sealed display models a solid S breaking into another solid and a gas. Each S unit can supply one gas unit. At this temperature and volume the display settles at eight gas units when both solids remain. If all S is used before it can supply eight, the gas amount is limited by the amount of S available.
| Trial | Starting S units | Gas units after settling |
|---|---|---|
| P | 5 | 5 |
| Q | 12 | 8 |
Question 1
In which trial is the gas amount limited by running out of S?
- P only
- Q only
- Both
- Neither
Question 2
Calculate how much S remains in each trial. Use the one-to-one model.
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Question 3
A student says the different settled gas readings prove the temperatures were different. Evaluate the claim with the two starting amounts.
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The display adds six S units to P without adding or removing gas or changing the temperature or volume.
Question 4
Predict the new gas count and how many of the added S units remain.
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