Question

Mass of an atom of oxygen ingram is 26.56896 x 10-24 g. What is the atomicmass of oxygen in u ?​

Answer 1

Answer:

16 gm.  

Explanation

⇒ Given,

Mass of the atom of oxygen = 26.56896 × 10⁻²⁴ g.  

no. of atom = 1.

Using the formula,

no. of atom = mass/atomic mass × Avogadro's number.

∴ 1 = 26.56896 × 10⁻²⁴/At. mass × 6.022 × 10²³

∴ At. mass = 15.999828 g ≈ 16 gm.