Final answer:
The correct rounding of Avogadro's constant to eight significant figures is 6.0221367×1023 mol-1, because the ninth figure in the more precise number is less than 5.
Step-by-step explanation:
If Avogadro's constant is to be rounded to eight significant figures, it would be represented as 6.0221367×1023 mol-1. To demonstrate correct rounding to this amount of significant figures, we look at the ninth figure in the unrounded number (if available) to decide whether to round up the eighth figure.
In this case, since a commonly used value for Avogadro's constant is 6.02214076×1023, when rounding to eight significant figures, the correct rounded figure would still be 6.0221367×1023 because the ninth figure is less than 5. Therefore, the unchanged eighth figure remains 6. Correct rounding of Avogadro's number involves knowledge of Avogadro's number and mole concept, as Avogadro's number (NA) is a fundamental constant in chemistry and is equivalent to 6.022×1023, representing the number of entities in one mole of a substance.