What can you conclude about these two reactions based on the chemical equations? reaction a: 6co2(g) + 6h2o(l) + sunlight ? c6h12o6(aq) + 6o2(g) reaction b: 2h2(g) + o2(g) ? 2h2o(g) + energy a. reactions a and b are both exothermic. b. reaction a is endothermic, and reaction b is exothermic. c. reactions a and b are both endothermic. d. reaction a is exothermic, and reaction b is endothermic.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.