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  4. The weight of a single atom of oxygen is

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Q. The weight of a single atom of oxygen is

Some Basic Concepts of Chemistry

Solution:

Atomic wt of oxygen $=16\, g$
Wt of $6.02 \times 10^{23}$ atoms of oxygen is $16 \,g$
So, weight of $1$ atom $=\frac{16}{6.02 \times 10^{23}}$
$=2.656 \times 10^{-23} g$