Is Ne an atom or a molecule and is it a pure element or a compound?

a. Atom, Molecule
b. Molecule, Pure element
c. Atom, Pure element

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

Asolution is made by dissolving 2.3 moles of sodium chloride (nacl) in 0.155 kilograms of water. if the molal boiling point constant for water (kb) is 0.51 °c/m, what would be the boiling point of this solution? show all the steps taken to solve this problem.

How can the number of core electrons be determined from the periodic table