How many atoms of silicon are in 0.75 mol of disilicon hexahydride, Si2H6? A.4.5x 1023 atoms B.6.02 x 1023 atoms C.8.0 x 1023 atoms D.9.0x1023 atoms

D. 9.0x10²³ atoms

Explanation:

First we use Avogadro's number to calculate how many molecules of Si₂H₆ are there in 0.75 mol:

There are 2 Si atoms in one Si₂H₆ molecule, that means that in 4.52x10²³ Si₂H₆ molecules there will be:

Thus the answer is option D.

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