Original Project
Substances, Chemical Reactions, and Conservation of Matter
Item SC092004: When a liquid changes to a gas in a sealed container and the number of atoms stays the same, the mass of the jar and everything in it also stays the same.
A student placed a liquid in a jar and sealed it. Then she heated the liquid and it turned into a gas. If the number of atoms in the sealed jar stayed the same, what happened to the mass of the jar and everything inside it after she heated it?
- The mass increased.
- The mass decreased.
- The mass stayed the same.
- It depends on whether a chemical reaction occurred.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||
|---|---|---|---|---|---|---|---|
| n = 2742 |
6–8 n = 1626 |
9–12 n = 1094 |
Male n = 1307 |
Female n = 1379 |
English n = 2403 |
Other n = 267 |
|
| A. | 16% | 18% | 14% | 16% | 17% | 17% | 14% |
| B. | 30% | 30% | 29% | 27% | 32% | 29% | 37% |
| C. | 38% | 34% | 43% | 40% | 35% | 38% | 29% |
| D. | 16% | 18% | 14% | 16% | 16% | 16% | 19% |