When both forward and reverse changes are physical changes, the resulting equation represents a
a. physical equilibrium
b. chemical equilibrium
c. reversible reaction
d. none of the above

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule