4. Calculate the freezing and boiling points of the following
solutions.
a. 51.6 g I, in 435 g chloroform
b. 2.40 g biphenyl (C12H10) in 75.0 g benzene

Which of these is the result of scientific research and not engineering? a. a new shoe design that features air cushioning for more comfort and protection b. the creation of glass with uv protection. c. a conclusion about diet commonalities among diabetics. d. the development of a smaller, more compact missile.

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.