Which statement explains why low temperature and high pressure are required to liquefy chlorine gas?
(1) chlorine molecules have weak covalent bonds.
(2) chlorine molecules have strong covalent bonds.
(3) chlorine molecules have weak intermolecular forces of attraction.
(4) chlorine molecules have strong intermolecular forces of attraction.

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa