An Amount of carbon – 12 Atoms equal to Avogadro‘s number would have a mass of exactly A) 1 gram
B) 6 grams
C) 12 grams
D) 6.02 x 10 23 grams

Explanation:

the answer is C12 grams

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as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.