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10 February, 16:28

How many carbon atoms are there in a 2.8-carat diamond? diamonds are a form of pure carbon. (1 carat = 0.20 grams) / ?

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  1. 10 February, 17:13
    0
    First let us calculate the mass of diamond (pure Carbon).

    mass = 2.8 carat * (0.20 grams / carat)

    mass = 0.56 grams

    The molar mass of Carbon is 12 g / mol and the Avogadros number is 6.022 x 10^23 atoms / mol, therefore:

    Carbon atoms = 0.56 grams * (1 mol / 12 g) * (6.022 x 10^23 atoms / mol)

    Carbon atoms = 2.81 x 10^22 atoms
  2. 10 February, 20:17
    0
    2.8 carat C x (0.20g C / 1 carat C) x (1 mole C / 12.01 g C) x (6.02 x 10^23 atoms C / 1 mole C) = 2.8 x 10^9 atoms C

    Use factor label method in order to determine the amount of atoms, make sure the units cancel.
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