If the concentration of mercury in the water of polluted lake is 0.200 ug per liter of water, what is the total mass of mercury in the lake, in kilograms, if the lake has a surface area of 19.5 square miles an average depth of 39.0 feet?

c. electrical charges of ionic bonds.

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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   

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