How many molecules are there in a 1.27kg sample of lithium carbonate

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.

Idon't mean to be a smart alec, length of atoms' bonds is the simplest way to define it.

Alfred wegener was a scientist who proposed the continental drift theory in the early twentieth century .simply put , his hypothesis propose that the continents had once been joined and overtime have drifted a part .