THSB
Substances, Chemical Reactions, and Conservation of Matter
A pure substance has characteristic properties, such as density, a boiling point, and solubility, all of which a…
Item SB047001: Two liquids with different characteristic properties cannot be made up of the same molecule.
A student determines the volume, density, and boiling point of two colorless liquids and lists them in the table below.
|
Volume (mL) |
Density (g/mL) |
Boiling Point (°C) |
Color | |
| Liquid 1 | 10 | 0.79 | 56 | colorless |
| Liquid 2 | 50 | 0.79 | 78 | colorless |
Are the liquids made up of the same type of molecule and why?
- No, because they have different boiling points, and substances with different characteristic properties must be made up of different types of molecules.
- No, because they have different volumes, and the type of molecules that make up a substance depends on the amount of the substance.
- Yes, because they have the same density, and liquids with one characteristic property in common must be made up of the same type of molecule.
- Yes, because they are both liquids, and all liquids are made up of the same type of molecule.
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 193 | 362 | 53% |
| Grades | |||
| 6–8 | 193 | 362 | 53% |
| 9–12 | N/A | N/A | N/A |
| Gender | |||
| Male | 104 | 200 | 52% |
| Female | 89 | 162 | 55% |
| Primary Language | |||
| English | 184 | 334 | 55% |
| Other | 9 | 28 | 32% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 262 | 353 | 74% |
| Grades | |||
| 6–8 | 262 | 353 | 74% |
| 9–12 | N/A | N/A | N/A |
| Gender | |||
| Male | 139 | 190 | 73% |
| Female | 123 | 163 | 75% |
| Primary Language | |||
| English | 248 | 327 | 76% |
| Other | 14 | 26 | 54% |