Donna poured 120mL of water into each of six glasses, Donna dissolved one tablespoon of salt in each of three glasses, and did not add salt to the other three. Then, Donna
placed an egg in one glass and observed if the egg floated. She removed the egg and
dried it. She repeated the process with the other five glasses, recording each time if the
egg floated. Donna repeated this test with two more eggs and counted the number of
times the eggs floated in fresh water compared to salty water.
3. Which experimental question that best describes Donna's experiment?
A. Are eggs more likely to float in fresh water or salty water?
B. Does the amount of water in a glass affect whether eggs sink or float in the water?

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.