The ionization energy for sodium is 496 kJ/molkJ/mol. The electron affinity for chlorine is -349 kJ/molkJ/mol. Use these values and Hess's law to calculate the change in enthalpy for the following reaction per mole of reagent:

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Be sure to answer all parts. the following equilibrium constants were determined at 1123 k: c(s) + co2(g) ⇌ 2co(g) k'p = 1.30 × 1014 co(g) + cl2(g) ⇌ cocl2(g) k''p = 6.00 × 10−3 calculate the equilibrium constant at 1123 k for the reaction: c(s) + co2(g) + 2cl2(g) ⇌ 2cocl2(g) 4.68 × 10 9 (enter your answer in scientific notation.) write the equilibrium constant expression, kp: