I believe it is a Covalent Bond because 1st off, Calcium sulfide is made up of 2 elements, Calcium (Na) and Sulfer (S). Both elements want to obtain 8 electrons to become balanced (An octet) so therefore, these electrons are shared between these 2 elements.
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B. increase in fossil fuel emissions
Explanation:
The increase in fossil fuel emissions cause global warming, not the other way around
The color formed when N2O is bubbled through Feso4 is = reddishbrown
Answer:
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