If an effusion experiment, it required 45 seconds for a certain number of moles of an anknown gas to pass through
a small orifice into a vacuum. Under the same conditions, It required 18 seconds for the same number of moles of oxygen to effuse. Find the molecular mass of the unknown gas.

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.