Question

If one mole of carbon atoms weighs 12 grams, what is the mass (in gram) of 1 atom of carbon? [3 MARKS]

Answer 1

Each point: 1 Mark

1. One mole of carbon atoms weighs 12 g (given)
i.e., mass of 1 mole of carbon atoms = 12 g
2. Then, mass of 6.022 × 10²³ number of carbon atoms = 12 g
3. Therefore, mass of 1 atom of carbon = 12 ÷ (6.022 × 10²³)
= 1.9926 x 10^-23 g