The model below shows a carbide ion What could be done to change this carbide ion to a
neutral carbon atom?
O remove 2 electrons
O add 2 electrons
O remove 4 electrons
o add 4 electrons
= +1
= 0
O = -1

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

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The answer is false because: gravitational force is independent of medium and depends only on the masses of the two objects and the distance between them

Ithink that one is (c)