Answer:
An element is a substance that cannot be split out into simpler substance by chemical means
A compound i is a substance consisting atoms of 2 or more different elements and these atoms are chemically joined together
Explanation:
I'm not sure what the question is asking, but the process would be considered endothermic (it absorbs heat)
The best and most correct answer among the choices provided by the question is the second choice , b. sodium hydroxide .
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