Fractional distillation is the process in which the alkanes in petroleum can be partly separated. This is due to the petroleum having different boiling points. The process starts off with the heating of crude oil for it to vaporize. The vaporized crude oil is then fed into the bottom of the distillation tower. The resulting vapor rises through a vertical column. As the gases rises through the distillation tower, its temperature decreases. Thus, certain hydrocarbons begin to condense and run off at varying levels. Each level-specific condensed fraction contains hydrocarbon molecules that has a similar number of carbon atoms. These "cuts" of boiling point allow numerous hydrocarbons to be separated out in a single process. The cooling of the tower height allows for the separation. Subsequent to the refinement, individual fuels may undergo more refinement to remove existing contaminants or substances so as to improve the quality of the fuel through cracking.
<span>Because of the location of its valence electrons, a C atom can bond in four places, rather than 1 or 2 like most elements. This allows for many different arrangements.</span>
Answer:
The correct answer is C. continued education
Explanation:
Education is important for both low and high-income countries for the prevention of disease in their people like HIV, tuberculosis. School education is very much important which provide information about the infectious and non-infectious disease to the children.
Educating children about the prevention of these diseases is important because school children are at the greatest risk of getting STDs. Education is one of the most cost-effective ways to prevent HIV, tuberculosis and other diseases. Therefore the correct answer is C. continued education.
The decreased carbon dioxide concentration inside the leaves and the increased leaf temperatures favour the wasteful process of photorespiration.
