Question

The mass of a single atom of carbon is (a) 12 g (b) 1/12 g (c) 1.99 × 10 -23 g (d) 1.99 × 10 23 g

Answer 1

Answer:

(d) 1.994×10‐²³g

Explanation:

Mass of one atom = Avogadro′s numberMass of one mole of atom=6.02×102312

Mass of one carbon atom = 1.994×10−23g

Answer 2

Option (c) is the correct answer The mass of a single atom of carbon is $1.99$×$10^{-23}$ gram

Explanation:

• We know that mass of 1 mole of carbon is 12 gm
• A single carbon atom weighs 12amu or 12 gm whereas one mole of carbon atom weighs 12 gram /mol
• One mole of carbon =$6.023$×$10^{23}$ atoms of carbon
• $6.023$×$10^{23}$ atoms of carbon=$12$ gram of carbon
• 1 atom of carbon = $\frac{12}{6.023}$×$10^{23}$

                            = $1.99$×$10^{-23}$ gram

The mass of a single atom of carbon is  $1.99$×$10^{-23}$ gram