2) why is coal considered nonrenewable?
o a) the supply of carbon on earth is limited.
o b) the processes that formed coal no longer occur on earth.
o c) the processes that form coal take millions of years.
od the heat energy in coal is released when the coal is burned.

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

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Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o