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7 February, 22:03

Which of the following apply to coal? Select all that apply.

A.) pollution is a problem related to burning soft coal.

B.) coal undergoes decomposition when heated to high temperatures in the absence of air.

C.) propane is a type of coal.

D.) coke is a residue that remains after volatile products distill off from the heating of coal.

E.) anthracite is a type of coal.

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  1. 7 February, 22:11
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    A, B, D, and E, are all correct. Soft coal burning releases toxic heavy metals, and the excessive presence of soft coal in an environment can lead to black lung, which is when the coal particles begin to accumulate in lungs. B is also correct, as when the coal gets heated it breaks down, which results in the energy production. Coke is a type of residue that comes off of heated coal that contains a high carbon content, along with a few impurities. Lastly, anthracite is a type of coal that's pretty abundant in northeastern Pennsylvania.
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