Answer:
a three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces.
Explanation:
The number of atoms of Hg in 4.5 mole sample has been given as . Thus, option A is correct.
The number of atoms in a mole of sample has been given by Avogadro number. Avogadro number has been a constant and has been given the value of .
The number of atoms in a mole of sample has been given as:
The given sample has been consisted of 4.5 moles of Hg. Thus, the number of atoms in the sample has been given by:
The scientific notation has been the short hand used for writing the numbers. The short hand for atoms in 4.5 moles of Hg has been .
Thus, the number of atoms of Hg in 4.5 mole sample has been given as . Thus, option A is correct.
For more information about the number of atoms, refer to the link:
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C.6 because the prefix hex