Are "of which" and "which" used correctly in the following sentence?
> > absolute location is an exact placement on earth which can be identified through the use of a geographic coordinate system (of which uses longitude and latitude).< <

yes it is, which is to state, of which is to clarify

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.

beneatha's hair symbolizes wealth  

hope this : }