Question

If $16$ grams of oxygen contain 1 mole of oxygen, calculate the mass of one atom of oxygen?

Answer 1

• We know that,
• Mass of one mole of oxygen contains $=16g$
• 1 mole of oxygen ($\mathrm{O}$) contains $6.022\times {10}^{23}$oxygen atoms
• Therefore, mass of $6.022\times {10}^{23}$oxygen atoms =16 g
• Mass of 1 oxygen atom = $\frac{16}{6.022\times {10}^{23}}$grams
• Hence, 1 atom of Oxygen($\mathrm{O}$) molecule weighs $2.65\times {10}^{-23}$grams.