Which element is primarily found in coal?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

Coal is primarily composed of carbon, which is the main element that contributes to its energy content. The carbon content in coal typically ranges from 45% to 86%, depending on the type of coal. This high concentration of carbon is what makes coal an effective fuel source for generating energy through combustion.

In addition to carbon, coal contains varying amounts of other elements, including hydrogen, sulfur, nitrogen, and oxygen, but these make up a much smaller percentage of coal's overall composition. While sulfur can be present and is a concern due to its potential to cause air pollution when burned, it is not the primary element. Nitrogen is also found in coal but in minimal amounts and plays a negligible role in its combustion properties. Hydrogen does form part of the coal structure, but again, it is not present in as high a concentration as carbon.

Understanding that carbon is the predominant element in coal helps to clarify its use as a fuel and its role in energy production.

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