Answer:
There would be 2.79 x 10^23 carbon atoms.
Step-by-step explanation:
Diamonds are made of carbon. You're given mass and want to convert to number of atoms. The common way to convert between these and other variables is through moles.
First find moles by dividing the mass by the molar mass (of carbon):
moles = 5.56 / 12 = 0.463
Next multiply moles by Avogadro's number to find the number of carbon atoms:
number of C atoms = 0.463 x 6.022 x 10^23 = 2.79 x 10^23