if 23grams of CaO reacts with excess nh4ci what volume of NH3 gas will be produced at STP? CA Oh 2 + 2 + nh4c = 2 NH3 + H2O + cacl2 ​

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.