3. (05.02 LC) Which formula can be used to calculate the molar mass of ammonia (NH3)? (1 point)
A. molar mass of N + molar mass of H
B. 3 x molar mass of N + molar mass of H
C. molar mass of N + 3 x molar mass of H
D. 3 x molar mass of N + 3 x molar mass of H

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.

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.