The situation of the Avogadro constant among physical constants is somewhat paradoxical.Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al. In chemical formula you may use: Any chemical element. To calculate molar mass of a chemical compound enter its formula and click 'Compute'.Silver chloride, often used in silver plating, contains 75.27% Ag. what is the mass in grams? a) 3.011 x 10^23 atoms F b)1.50 x 10^23 atoms Mg c)4.50 x 10^12 atoms Cl d)8.42 x 10^18 atoms Br e) 25 atoms w f) 1 atom Au can you please explain a and b to me then i'll come back later and see if i did the rest right? Thanks in.4th September 2020 COVID – why terminology really, really matters When is a case not a case? Since the start of the COVID pandemic I have watched almost everyone get mission critical things wrong.