Respuesta :
The chemical standard used as a basis for the quantity of a mole is the carbon-12. Thus, the answer is letter D. By definition a mole is the number of atoms that would compose 12 g of the carbon-12. The reason for choosing such is that carbon is plentiful and not too hard to make isotropically pure.
Answer:
thanks... this answer is helpful to the question, the answer is d) carbon-12
Explanation:
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