1. A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she
put it outside, the water was a solid. Twelve hours later, the water had changed phase and was a
liquid. What happened to the water molecules?
Before the student left, the molecules were moving in place. After the molecules were
moving around each other.
Before the student left, the molecules were moving around each other. After the molecules
were moving away from each other.
Before the student left, the molecules were moving around each other. After the molecules
were moving in place.
Before the student left, the molecules were moving away from each other. After the
molecules were moving around each other.
Answers: 3
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Wind and moving water provide energy. chemical mechanical thermal none of the above
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Why do the strengths of london (dispersion) forces generally increase with increasing molecular size? choose one: a. heavier atoms have stronger attractions for each other than lighter atoms. b. dispersion forces are all equal in magnitude; there is no size dependence. c. dispersion forces arise from the attraction between the nuclei of atoms, and larger molecules have larger nuclei. d. dispersion forces arise from dipoles caused by the electron distribution being distorted. larger molecules have more electrons and, therefore, more distortions and a bigger force. e. dispersion forces depend on distance. larger molecules are farther apart and so the forces are smaller.
Answers: 2
1. A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When...
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