Which of the equations below is an example of a thermochemical equation?
O 2 H2 (g) + 2 02 (g) --> H20 (g)
O 2 H2 (g) + 2O2 (g) --> H20 (g) + 483.6 kJ
O Mg + 2 H3O+ + Cl --> Mg2+ + 2C1 + H2+ H20
0 Mg (s) + 2 H3O+ (aq) --> Mg4+ (aq) + 2 H2(g) + H2O (1)

Why is silver chloride is an ionic compound

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.