The empirical formula for the hydride of sulfur is H2S, and its central atom is sulfur. Based on this infor-
mation, you would expect the empirical formula for the
hydride of selenium, Se, to be
and its Lewis structure to be?

Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

Explain that newton first law,second law and third law of motion?

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.