How many molecules in 13.5 moles of potassium chloride

13.5 Moles Kcl x 6.022 x 10^23 /1

= 8.12 x 10^24

whenever you need to find molecules just multiply moles by avogadro number

a:

by the combination of an unlimited number of elements

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.