The composer puts together musics for people to sing or play on instruments.
Who is laboratary
because of their chemical composion
Iron is an element and contains only atoms with the same number of protons in their nuclei.
they differs only in their chemical composion in carbon-hydrogen-oxygen!!
I suppose that you think to eucalyptus oil; this oil contain a great percentage of cineole. This oil contain also piperitone, phellandrene, citral, methyl cinamate, geranyl acetate etc.
Assuming you mean "fuel pressure regulator", it is located under the upper intake manifold connected to the bank of fuel injector poppets also known as the "spider".
metals like iron, copper, gold, silver and such cannot be broken down to simpler molecules. They are they're own molecules. If you mean what is their makeup, they're "made" of atoms. Most metals used by industries and people in general are compounds of different elements, which change (obviously) the composion of the metal, for different uses.