Question

What is the mass (in gram) of?

1 atom of oxygen

Answer 1

To calculate the mass of 1 atom of oxygen:

Atomic mass of oxygen = 16

1 mole of atom = 6.022 × 10²³ (Avogadro’s no.)

Hence, mass of one oxygen atom = \(\frac{Atomic\,mass\, of\, a\, mole\, of\, atom}{avogadro's\, no.}\)

Hence,mass of 1 oxygen atom = \(\frac{16}{6.022\times10^{23}}\)

Mass of 1 oxygen atom = 2.65 × 10²³g