Is mixing salt and pepper physical or chemical change ?

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;

the answer is 0.42 is that is an option. this question provides no info