Question

If one mole of carbon atoms weighs 12 gram, what is the mass (in gram) of 1 atom of carbon?

Answer 1

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A mole is defined as exactly equal to 6.022×1023 atoms. So, we know that a mole of carbon contains 6.022×1023 atoms. Therefore, we can write the mass of 6.022×1023 atoms = 12 g. Hence, the mass in grams of 1 atom of carbon is 1.993×10−23g .

Answer 2

Answer:

1 atom of carbon weighs 1.99×10⁻²³ g

Explanation:

1 mole of carbon atoms weighs 12g.

we know that,

  number of atoms  = moles ×  Avogadro's number

⇒                               = 1 × 6.022×10²³ = 6.022×10²³ atoms

1 mole of Carbon contains 6.022×10²³ atoms

So, 6.022×10²³ atoms weigh 12g

       mass of 1 atom = 12g /6.022×10²³ = 1.99×10⁻²³ g

Thus, the required answer is 1.99×10⁻²³ g