Mixing a cocktail is it a physical or chemical change

In 2002, the rare earth elements mine in mountain pass, california was closed because

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.

How many moles are contained in 5.6 l of h2 at stp