Which of the following shows the correct products (and states) for the reaction you will perform in this lab? choose one answer from below. choose one answer from below. na2co3 (g), h2o (g), and co2 (g) na(co3)2 (s), h2o (g), and co2 (g) na2co3 (s), h2o (g), and co2 (g) nahco3 (s), h2o (g), and co2 (g) na2co3 (s), h2o (l), and co2 (g)

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

answer; talc and gypsum;

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.