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.
Pre-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 362 |
6–8 n = 362 |
9–12 n = 0 |
Male n = 200 |
Female n = 162 |
English n = 334 |
Other n = 28 |
||
| A. | No, because they have different boiling points, and substances with different characteristic properties must be made up of different types of molecules. | 53% | 53% | NAN% | 52% | 55% | 55% | 32% |
| B. | No, because they have different volumes, and the type of molecules that make up a substance depends on the amount of the substance. | 22% | 22% | NAN% | 23% | 21% | 21% | 29% |
| C. | 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. | 19% | 19% | NAN% | 18% | 20% | 18% | 29% |
| D. | Yes, because they are both liquids, and all liquids are made up of the same type of molecule. | 6% | 6% | NAN% | 8% | 4% | 6% | 11% |
Post-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 353 |
6–8 n = 353 |
9–12 n = 0 |
Male n = 190 |
Female n = 163 |
English n = 327 |
Other n = 26 |
||
| A. | No, because they have different boiling points, and substances with different characteristic properties must be made up of different types of molecules. | 74% | 74% | NAN% | 73% | 75% | 76% | 54% |
| B. | No, because they have different volumes, and the type of molecules that make up a substance depends on the amount of the substance. | 13% | 13% | NAN% | 12% | 15% | 12% | 27% |
| C. | 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. | 8% | 8% | NAN% | 9% | 6% | 7% | 15% |
| D. | Yes, because they are both liquids, and all liquids are made up of the same type of molecule. | 5% | 5% | NAN% | 5% | 4% | 5% | 4% |