Marcn each teature related to the process or searoor spreading with its location on the diagram. mid-ocean ridge
magma
normal polarity
youngest rock
reverse polarity
oldest rock
+ Normal polarity
-Reversed polarity

The total number of electrons is 14

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

Molarity is moles of solute over liters of solution. idk if that is what you are talking about, but you can convert moles of solute to grams of solute using dimensional analyzes by using molar mass found on the periodic table.