By using the following reactions, calculate the heat of formation of pentane (c5h12) gas from carbon and hydrogen gas. c (s) + o2 (g) co2 (g), h = 395 kj/mol h2 (g) + 1/2o2 (g) h2o (l), h = 285 kj/mol c5h12 (g) + 8o2 5co2 (g) + 6h2o (l), h = 3.54 × 103 kj/mol

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.